I don't, but I have a lot of 250 GPH Mag Drive pumps sitting here that I wanna sell....
BTW, they also have a fountain attachment..... so you have have all sorts of cute little fountain patterns if you decided you wanted one for making a fountain...
But seriously, I'd bet its just an air bubble trapped in there.. the only user servicable part is the impellar. I think it'd be worth a look before you go looking for something that might be impossible for fix...