Don...... I just finished my own K0 restoration. My seat was really bad. I repaired and painted the seat pan (after dismantling it). The foam was completely shot, but I saved the chrome trim and the hard rubber bump piece, from the duck tail. At the time, there was a guy selling covers on EBay: “Bob the seat”. I traded emails with him and ended up posting him the freshly painted pan, trim and bump piece. It took a few months, because he spends some time wintering in Spain or Portugal, but what came back was absolutely perfect! And from memory, he only charged me about $250 + postage. Greatguy and absolutely perfect work. He did not use red foam, but I dyed mine around the holes....... try sending him an email to: morettidirect@aol.com.
Say Hello from John D in Canada, a VERY satisfied customer!