Need correct part number for distributor support / cam oil seal?

I have an 1987 328 GTB, number 69027, with engine model F105C-040. The distributor cap support for this engine is part number 126115 (you might be able to just make it out in the picture below). The parts diagrams say that the correct oil seal for this engine is 132453. However, take a look at the second pic below. That oil seal will not fit in this distributor cap support.

If I dig down a little, it seems like the distributor cap support has been superseded. Old part is 126115 ... new part is 133100.

1. Am I correct in assuming that the oil seal listed in the diagrams (132453) is the correct one for the NEW distributor cap support (133100)?

2. Also, the old distributor cap support was also used on the Testarossa (1987). For some reason, the parts diagrams for that Testarossa engine also say that the distributor cap support was superseded, but they list a different oil seal (132452), which I assume was the correct oil seal for the old support. Is that correct? Is oil seal 132452 the correct part for the older distributor cap support?

3. Last question ... it looks like I can source two used distributor cap supports (more expensive now, but easier to source new seals) - or I could buy two of the older oil seals (cheaper now, but the seals are harder to find and a lot more expensive than the new seals). What are your thoughts on replacing my distributor cap supports with the new part? Is the new part a direct fit onto this engine?

Thanks.

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Help me with this. How would I tell if I have this?

Also, I ended up buying what I thought were updated cam seal carriers off of eBay. It ended up that they had the same part number (126115 - you can't see it in the pic, but both carriers below have the same part number stamped into them), but the dimensions of the hole where the seal sits were different: My original carriers have an ID of 45mm, the "new" ones have an ID of 47mm. The new seals I bought (BTW, three sets of seals all purchased from different sources, and all were the same with a 47mm OD). Here's a pic of "old" carrier and seal on the left and "new" on the right. The old ones seem to have some sort of aluminum insert pressed in. Also, my old seal has a clockwise direction arrow molded in, the new one on the right does not.

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Ugh, went down the rabbit hole and now I'm even more puzzled. Service Bulletin 10-18 addresses this seal & carrier issue directly (starting at page 3 for the 328 and Mondial 3.2).

For the 328 in the USA starting with chassis 69639 (I have 69027 FWIW), the seal carrier was superseded (old = 126115, new = 133100). The new oil seal is PN 132453 (which I think I bought - three times). The SB then goes on to say this:

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I read this to say that the new part has an OD of 47mm and should be used with seal carrier 133100. That said, the "new" seal carriers that I bought off of eBay are labeled "126115" and have 47mm IDs. And the 47x7x35 seals that I was sold all fit after popping the 1.25mm spacer out.

So, I'm as puzzled as ever.

 

This makes a lot of sense, and visually, my old seal carriers do in fact appear to have inserts. I've tried gently removing them, but no luck. And because insert & carrier both seem to be aluminum, heat doesn't seem to make it easier. Any suggestions?

Yeah, I'm in that range; my engine number is 01123.