correct leaf spring bolt cuda

[culp71]

all,

I am looking for a new pair of correct leaf spring center bolts.
I have found a few, but all are either the wrong style head, or diameter.
original holes in leafs are 0.349, so I would want 5/16, 21/64/ 11/32 or 23/64 as
all 3/8 found (0.375) are just too big.
also the head style on originals are very high and domed, were others seem short and flat.

any help would be great as to where to find the correct size and style bolts.

Thanks

[culp71]

If original style is not available, what has been used?
It seems this smaller size is not common, also has anyone
simply drilled out springs to accept large center bolt?

[anlauto]

Originals are available from AMK