Sorry to hear you are still looking, had the find of my life? when i unearthed a Super T 2 months ago in very poor order especially frame, pictures on http://www.sportsmoped.com forum, the lads on there are great and may be able to help track one down or Chris Alty at Sports moped owners club, but i bet you have tried them already.
Good luck with the hunt will keep my ear out, but they are rare. cheers, Ian.
i am selling my fully road legal taxed tested v5 in my name Super T and it isnt Â£3k, if you send me your email address i will send pictures and contact details, regards, Ian.
if you follow the previous link you will find pictures of it today with 12v electrics etc it isnt perfect and i am happy to discuss points that arent fully original and the work put into it ,but it is nice and usuable but needs tlc , goes well my daughter has had over 55 on the clock