Edit: I even found the dealer:

Their inventory is super sweet (but overpriced):

So this has been driving me crazy. A few months ago I was looking at the stock of independent dealships, as I do when I’m bored, and I came across a dealer that had a sort of ugly, but kind of awesome car I had never seen before. The only things I remember for sure about it was that it had kind of a dumb name reminiscent of a 50s b-movie monster, like Mongo, and that it was basically a 2000-2005ish American muscle car drive train. It had some sort of production connection to Europe, maybe Germany, wasn’t connected to a major manufacturer, and wasn’t a kit car. I remember it definitely having a Wikipedia page.

Basically, I’m looking for something like a “Something something Mongrel” with a Mustang engine. Help me, Oppos!