I'd measure diameter and installed height, and find an aftermarket item that is suitable.
The 972 set mentioned is here:
http://www.compcams.com/Products/CC-...gs'-0.aspx
IMSLTHO, you don't need $100 valve springs...
I get a lot of parts here:
http://www.competitionproducts.com/1...ucts/2630/0/1/
98411 would be my first guess, but measuring is safest.
Terry