Pressure plate bolts - small v8 flywheel

Seems like the early v8 abody (small flywheel) pressure plate bolts are 5/16" and don't appear to follow the later standard of 3/8". I only have 3 of 6 (damn - i thought i was careful about bagging them!!!) so i'm on the hunt for replacements and i'm not having much luck.

Looks like MrGasket sells 5/16" for ford but they're 1" long and the ones i have are 7/8" long (1/2" of it is threaded)

Anyone have leads?

thanks!