I checked and it appears that the 201 diff bolts right up to the subframe without a mount. So you're good there:-)

Those flex discs run 130 USD, but again, they don't make one to fit the 201. They had a page on their site where they claimed to be willing to fab up custom discs, but they've removed that page from their site since I asked them to make one. Pretty weird.

Since your car was born a manual (mine wasn't) have you checked to see if that linkage damper thing a.k.a. "dashpot" is worn out? PN 6010701367 It's supposed to help prevent this issue.