I've been trying to reach KO Motorsports to purchase a Flex Disc / driveshaft coupler / Guibo, no response.

http://www.koperformance.com/part-nu...539-005/O-E-M-

Has anybody been able to cross reference this part to another application like BMW, Alfa, VW, etc. that could be ordered from a regular auto parts house?

 

Amazon for 60.00 put this in your other post.

 

Just in case someone else comes across this and is looking for part numbers:
Porsche 99742102000S1
Febi 34774
SGF GAP01-002 (could not find this at time of posting)

I gather that Doorman and Napa have one that works as well but I could not find those. I ordered a Febi and it is on the way.

***update*** the febi unit I received was the SGF Porsche part with the Porsche logo skived off.