I have a rough Chase H.Q. that is the same style as the OP's. I guess there were two versions of the side art? I'd take a picture, but it is really rough. I'm not sure how useful it would be.
Yep it's a Euro cab, It was the best I could come up with as there is not much to be found on Chase HQ
I once had the chance to buy one like this at a really cheap price but didn't go for it.
Now I wish i had as I love that game and the cab is nice and small.