Help Identify These Drones/Bots?

[Warren Abox]

Bought these from out of a glass display case at the FnLGS (Friendly non-Local Gaming Shop) while traveling, and can't find them anywhere.  Anybody know who makes these?  I'd like to know if they have any other styles...

[von Lucky]

They look like Germy's sculting:
http://www.germy.co.uk/makingsci-fi1.html

[Hobby Services]

Are they BOPPER minis from Metagaming's ancient Rivets boardgame?  I know there were figures made for it, although I've never seen them.  At the very least they're an homage to the game.  No other excuse for the can opener on the Jack Bopper, the middle two are probably Rocket Boppers, and the one on the left is a Tiny (pronounced "teeny" of course) Bopper.

[von Lucky]

Hadn't thought about them being that old, but looks like a homage:
http://murdocksmarauders.blogspot.com.au/2014/07/rivets-boppers.html

[Warren Abox]

Yep, that's it.  Even more obscure than I thought.  Thanks for the help.

[von Lucky]

Probably shouldn't been clearer - they don't look like the exact miniatures in the game (but as we currently think, a homage), and the recasts in my link above don't look as good as the miniatures in the original post.

So... still a mystery.

[YPU]

Yep, that's it.  Even more obscure than I thought.  Thanks for the help.

Same game line that produced OGRE, so not that obscure.