You can get it, and all the songs from Perfect Square, from Soulseek. Also, I think the version of Country Feedback you are looking for is the same one featured on Disc Two of the 'deluxe' edition of "In Time - The Best of REM".
Yep, that's the one. And what a performance it is!
I'm about to upload the b-sides to the Tongue single, three live trax from SNL in 1995.