No luck contacting vendor

[1948F-1Pickup]

I purchased an exhaust manifold bolt and washer set for my '48 8BA a few months back from a vendor that also posts on this forum and has his business in McMinnville, TN

Sent a PM to him recently too- "Works fine but missing one of the black oxide lock washers….. I got a flat washer in the set…. just need one black oxide lock washer.
I sent the single flat washer back to you but got no response."

And so far still no reply.