UNC - Aircraft bolt suppliers

Hi list,

I am trying to obtain some 3/8" UNC (coarse) thread bolts in 7/8" length, 
perhaps a bit shorter and no-one in the UK seems to have any.  One supplier 
told me they didn't exist though I think the reality there, is that his US 
supplier (he gets them via an importer) Coast Fabrication, don't do them.

I think SPS may do them.  So does anyone have details of a retailer or outlet 
that might have some?

Daniel1312