Saw this seat on ebay tonight. Looks good, and is dirt cheap.
http://cgi.ebay.com/ebaymotors/Parts-Accessories_Motorcycle-Parts-Accessories__Honda-Cafe-Vintage-Road-Racing-Seat-NEW-Black_W0QQitemZ350128917160QQddnZPartsQ20Q26Q20AccessoriesQQadiZ2863QQddiZ2811QQadnZMotorcycleQ20PartsQ20Q26Q20AccessoriesQQcmdZViewItemQQptZMotorcycles_Parts_Accessories?hash=item350128917160&_trksid=p4506.c0.m245&_trkparms=72%3A543|65%3A12|39%3A1|240%3A1318
Good luck
http://cgi.ebay.com/ebaymotors/Parts-Accessories_Motorcycle-Parts-Accessories__Honda-Cafe-Vintage-Road-Racing-Seat-NEW-Black_W0QQitemZ350128917160QQddnZPartsQ20Q26Q20AccessoriesQQadiZ2863QQddiZ2811QQadnZMotorcycleQ20PartsQ20Q26Q20AccessoriesQQcmdZViewItemQQptZMotorcycles_Parts_Accessories?hash=item350128917160&_trksid=p4506.c0.m245&_trkparms=72%3A543|65%3A12|39%3A1|240%3A1318
Good luck