The endura is so crap and old there won't be a lot around for them, superchips use to do an off the shelf chip for a standard engine, exactly what are you doing to it? Maybe you will get better advise once you've said what you're doing with it

Just put a Zetec in it or 1800/2000 out of something else, even spendings lots of cash on a turbo conversion with aftermarket management you may make 110hp on the endura engine which is still lame and you'll be skint lol