Haha, that's literally the funniest line in the entire show, when she calls him "Ass Monkey".
There have been some spinoffs/crossovers. I don't know the names of the guys, but the guy that used to paint I think had a show for a short time, there was a mechanic who went to another show after he left/was fired (depends who you talk to) and there was a third guy that came on and did some stuff for Richard after Aaron left that I think was on another show. They've also tried to shoe-horn Aaron into at least two shows now and while I love the guy - I do - the shows were just boring.
And that's the rub, isn't it? As bad as it is with the scripted stuff, there's only so much you can do with the real stuff. The producers and stars don't have the discipline to walk away when the well starts to run dry. I've been to Gas Monkey; it's a mini-Disney land. The gift shop is a separate building almost as big as the garage itself. I've been to the Pawn Stars pawn shop, and while it IS a working pawn shop, and they do have a couple cool things - I came THISCLOSE to buying a book of matches that were from the Led Zeppelin Starship private plane - the entire back half of the store is show merch, and NONE of the people you see on TV are there now unless they are filming (though I have to say, the people that DO work there were some of the nicest people I've ever dealt with in a pawn shop. No ego, no arrogance, nothing, which is rare for a pawn shop, and when I was done I asked about a cab and the gyu at the door was all "you don't worry about that, I'll flag one and let you know". I needed to make a call so I was outside, and he did NOT just call his buddy, he literally went in the street and flagged down a cab for me. I offered him $5, and he declined it ("cant' take that"), so it wasn't for the tip either.)