Triad with chassis number Tri-04 is still missing. Q727JEY starts with Tr104. Maybe that's the one I was looking for...
It hasn't been used for the last 12 years and remains in good condition when knowing it has been parked outside all this time. Anyway, it needs some work to go back on the road.
Steve's father plans to sell it on Ebay soon... Any interested parties should contact Steve (member of the Mosquito, Trimin & Triad Register group on Facebook).
More information on this page: http://www.mosquito-triad.com/Q727JEY.html