Space Invader 2 included in Entex Select-A-Game is very similar to the standalone Space Invader so they might be using the same chip.

I think the Led Sports games are a completely different beast though, there are a few cheap on ebay right now, I'd buy one just for the sake of checking it out, but the overseas shipping costs the seller is asking is just ridiculous. Most of these end up not selling at all from what I've seen lately.