Seat replacement and passenger pegs.

[TonUpCafe]

I want to put cafe style seat with a place for a passenger on my GZ.if not a cafe than at least a thinner one piece seat. As it is right now the frame has been cut and rewelded with an extension that is flat but I still have the factory single seat. Anyone know of any seats that will fit my current layout? should I just start off with a custom seatpan and go from there? Also trying to find out the diameter of the tube part of the frame because I want to attach clamp on passenger pegs. I think its 1" but its a pain to measure and wanted to know if anyone has done this before.