I might try and talk them into getting anotehr Solid U still. But first question, aren't those discontinued now? And if so, would it be hard for them to get one, or not since it hasn't been that long? I don't think they carry Lane 1's in their pro shop, so they'd have to go to the manufacturer.
One of their actual excuses for not wanting to replace mine with another Lane 1 was that shipping would take a while if they only order one ball (which I don't really buy). And after I showed them what ball it was, their reaction was kind of like, "Ooh, that will be tough to replace. Any other ball you want besides Lane 1?"
I would feel weird asking them what their max offer was for a new ball, then asking how much a Solid U would be, and then giving them the difference (if in fact that is one of the obstacles). But I guess I can ask again why they don't want to get me another Solid U, and if it's a price issue, offer to pay some extra.
In the end, if I can't end up getting another Solid U (wouldn't want to try to replace that one with a different Lane 1), would an Elite PBA Shark be good? That's the ball that my pro shop guy suggested. Similar coverstock, and a good ball.