Enlarger Bellows Rebuild - modern tricks?

Materials technology has changed a great deal in the past few decades, so I

am hoping (L-A-Z-Y) that there might be a flexible, nonsticky, spray-on 
coating that can be applied inside and outside a large bellows (for 10X10"

enlarger).

For smaller bellows I patch pinholes using a material intended for those
old 
'soft top' hardtops of the Seventies. It applies smoothly, sets up
flexible, 
and is dead-black. But it won't fix this old bellows.

If none, then I think I might just send the old bellows to England to be 
copied.

jjs