Rubber boot

Try Andy Bernbaum. He officialy does parts up to 62 but the boot is the same.

http://www.oldmoparts.com/Default.htm


It is fairly easy if you have access to a press. If you need to thread it in and around it can be quite an experience. It may go in smoothly or may try to pop back out at every opportunity and make you say words you never even knew you knew!! Just be very careful not to poke a hole in it.