Anyone know where I can et a manifold for this pipe?

[EightySeven550]

Hello all, I am looking for a manifold for this exhaust pipe.
(I was told it is most likely a riva spec 1 wet pipe.)

It is jacketed.

Thats about all I know about this pipe so far.

Thanks,
Andre

 

[snowxr]

If you don't find one I'd but the chamber for a spare.

 

[EightySeven550]

Bump - Uncle's got his ski together and trying to use this pipe