Anyone recognise these wheels from ebay please?

Those don't look like any OEM Ferrari wheel I've seen, even scouring through Ferrari wheel pics on google.
When they say specially made, it could just mean they are Ferrari fitment, but could be from anywhere.

If you look on the inside of the wheels there should be either a sticker or an engraving on the metal showing the information of the wheel.

Regardless of the brand, it should also show what offset they are. It would have a +/- in front of the number. With the offset number and the wheel width you can determine how it fits compared to OEM, then decide if you want to add spacers. I would personally not order spacers until I get the wheels in and test fit to see for myself. If you get them wrong it's a pain to have to be returning spacers from Hill back to the UK, if you're not there.

 

The OEM 17" wheels front offset should be +50mm (8.5" wheel) and the rear is +24.6mm (10" wheel)

So for the new rears, 0.5" wider (12.7mm), divide that in half considering just looking at the outside area, (6.4mm), subtract 1.6mm from the new lower offset.
Those new wheels should then pop out an extra 4.8mm from the OEM 17" wheels.
If the go-to Hill spacers are usually 15mm then I'd say you can get 10mm spacers to be more standard fitting. Unless you want to be more aggressive you can stick to the 15mm ones.

 

Correct, you wouldn't need spacers if you want it to look OEM, just depends on what you're going for.

 

Interesting design. Please post a photo when you get then mounted up .

 

Congratulations. They really do freshen up the car.

Who cares what anyone else says/thinks, as long as you enjoy them.

 

They look great! Willing to bet you notice a significant difference in handling based on the side wall heights. I did when I went from the 17s to 18s.