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Originally from Freewheeling Bicycles in Austin, TX as seen on the decal (now out of business).
Best of luck finding another one.
The exact number of Trek MOD Big Wheels produced is not publicly documented. However, available information suggests that they were manufactured in limited quantities. The MOD was a unique project by Trek, aimed at creating a high-quality, aluminum-framed drift trike designed for both children and adults. Its standout features included a rugged frame, adjustable seating, and large rear wheels suitable for power-sliding. Notably, stunt performer Travis Pastrana even backflipped one during testing, highlighting its durability and appeal.   
Given their limited production, Trek MOD Big Wheels are considered rare today.