Google it! In almost every area of Noth America there are BPT 4WD GTX/GTR transmissions for sale. Your Protege is one of a very small number - especially compared to FWD Escorts, Proteges, and MX3s etc. that buy a BPT, and have no use for the 4WD transmission.
BTW - and not to single you out, but attach a general location to your user name (state or province at least). There are people posting on these forums from all over the world. For internet safety, don't post your home address, but you will get more responses from people if they know what general area you are in. I can't tell you how many times I reached out to help someone with a part, only to find out that they were too far away. Transmissions are not 'cheap' to ship!