official aftermarket small scale releases

Hi guys and girls

I hang out in the lynx and jag forums but I do have 3 different VCS / 2600 juniors from young childhood in the early 80s.

I've got three shoeboxes of carts but rather than building on that collection what really interests me are home brewed small scale pro releases. Of which I have none. In passing I've seen releases like space rocks and associated label competition.

I wonder of there is a comprehensive list of such releases along with likelihood of these releases being available..?

All the best