When I needed a sprocket for my TMEC 200, since they used, for some odd reason, a few different Euro bike sprockets, as opposed to what most every other endure uses--Honda XL185 sprockets, I ended up ordering from a shop in the UK who agreed to send me one (it took a few shops to find the one!). It was easier and less cost than ordering direct from JT Sprockets' US affiliate (it was a JT sprocket). If you can figure out which JT the Trickster uses, email these guys
http://www.urbanbike.co.uk/ and see how much it would cost. They came through for me!