XJ-SC Soft top bolts

Hi, I recently purchased an Italian market 3.6 manual XJ-SC out of an aircraft hangar in Georgia, USA. It didn’t come with a hard or soft top, but I was able to find a NOS full rear soft top section with the frame.

However, it didn’t come with mounting hardware for the C pillar attachment points for the frame. It seems the bolts which affix the soft top to the body under the rear window are the same as the 4 for the frame.

Could anyone tell me A. if they are, and B. is there anywhere to buy them?

I was interested in something original looking, rather than hardware store bolts. These are a pan head hex bolt.

Thank you, N