Stiffer motor and transmission mounts?

Are there stiffer engine and transmission mounts out there for our cars?

My CS has 3 year old CS engine mounts and a 2 year old F430 transmission mount.

While doing all of the work on the car, I looked at the transmission mount, and it is already a little saggy. Not much, but a little, and that's with no weight on it. Same goes for the engine mounts. I would happily swap these out for stiffer units, but don't seem to be able to find any. I was told to use the F430 Challenge mounts, but when I look those up on Eurospares, the F430 Challenge motor mounts are the same part number as CS motor mounts, and then the F430 Challenge transmission mount is the same part number as the standard F430 transmission mount. That seems odd to me.

Anyways, just curious on what people have done, or if I just replace these with the same units I currently have on the car. I prefer a stiffer and rougher car so stiffer would actually be something I'd like. if not possible though, then it is what it is. CS and F430 mounts it is. Again.