1968 340 Manual Cam

i have been looking for a source for an exact replica of the 68 340 4 speed cam. i recreated the same 68 340 4 sp formula s i had in high school in 69-72 and want the exact same cam that the 68 340 4 sp came with from the factory. do any of you guys know where i could either buy an original NOS cam or have one ground to the same specs?

thanks...

jim coster, pittsburgh