Johnson Rod (7/11/2008)
Concours Parts (
www.concoursparts.com ) has new studs, washers and nuts.
short stud part # 88413-S, 1 3/4" long
long stud part # 353409-S, 2 1/2" long
lock washer part # 34808-S
brass nut part # 34673-S
Thanks. For now it is just the 4 studs required to attach the exhaust to the manifold.
The parts quoted above, dont appear to be in stock at Concoiurs.com. Only the lock washers.
I put them all on the quick order form & they came up as not available.
Got any other avenues I can try.
As for other SAE nuts/bolts I can probably get those here. Its just the 4 studs & nuts I need from a specialist.
Thanks.
Picture taken in 1960. Funnily enough it still looks like this! 
1959 Mercury Monterey 312 Y Block. NORFOLK, ENGLAND, UK.