new?! well why didn't you say money was no object?
i have a seat supposedly from a 500 (year?) i was gonna chop for a cafe seat. besides not wanting a cafe seat anymore, the mounting is a tad different than my 74 550, and i figured the seat too nice to adapt the mounting changes, so it just sits. the seat
isn't mint but i don't recall there being any rips in the material. i'll snap some pix.
but, if your seat is basically sound and with good foam, you can get good oem type covers, sometimes with the hardware bits too.
also, try these guys.
http://www.crc2onlinecatalog.com/seat_covers.htm $65? check the review section on this forum as to whether these guys are good to deal with, or maybe someone can chime in, i've not personally dealt with them.
here's a place i had lined up to recover my seat as they seem like a good operation:
http://www.sargentcycle.com/custserv.htmotherwise, if you don't see what ya need used ya gotta be willing to wait.