Well, I've already ordered the RG1550 guard, for pure simplicity's sake. I'd rather just order a replacement and roll with it than try to decide between 2000 different designs and remove all the hardware from the one I have, send it in, wait for the new one to be cut, shipped, hope it fits... etc. If nothing else, guitar center will take it back if it doesn't fit.
So, if anyone knows if it'll fit, i'd be most grateful.
I'm not sure. Isn't the 2550 neck a couple of mm wider at the top of the neck? You might have to hack a little bit off, but I think otherwise it'll work.
BTW, you don't have to look through 2000 designs, just tell them what you want and have them make it. The choice is yours, though. But of course it'd fit, it would be exactly the same fit as your current plate, IE; perfect.