Hi Justin, and welcome!
Wow you've had pretty much the lot, Mazda-wise!
As for the V6, according to the "How Many Left" website there are only 67 left on the road in UK ... I don't know about on SORN, so you'll have your work cut out to find one in good working order. I've heard of two being gutted for parts in the last week though, so if you want a "project" you'll almost certainly find something if you're prepared to trailer it home.
There are 3 that regularly turn up to club events, though there might be more abroad or on the Facebook group.
Yes, do post your photos!

Serena