I replaced my front tramp this summer. In trying to save some money, I purchased aftermarket from SLO sails and it has worked great this summer. Is about half the cost of OEM, but I'm guessing it won't last as long.
If your mast is bent, I'm guessing it is the aluminum section and not the comp tip? I was told by the owner of a hobie dealer nearby that you can salvage either part of the mast and re-attach the sections in the middle after (somehow) separating the epoxy. I think each section is around 1000 dollars. If you look on the official hobie getaway website, they have the parts manual in a pdf with all the parts numbers. http://static.hobiecat.com/digital_asse ... _Parts.pdf
Google the parts number and you'll come up with a few sailing sites that sell Hobie stuff. I've found most prices to be very similar. I order most of mine from backyard boats in Virginia. Always very helpful on the phone.