It depends on how much you want to spend, but the case you want (molded or wood) needs to NOT be contoured to fit a J or P. In other words, open where the body lies. Sounds like a casket description.
Fender makes a wooden case, tweed or black, with the Fender logo on the lid. I think they call it "deluxe". I had one for my now-gone Reverse Jag. They go for about $129 and are super nice cases. I have a G&G case and the Fender looks just like it.
Molded, look for the Gator model GC-B(?) or something similar. I've had quite a few and still have one for my P bass. It has an open body cavity (eew) and can fit nearly any 34" or 35" bass. They run $99 at Sweetwater last I checked.