>>1372003Just get the cheap standard TRK and call it a day. In case it doesn't fit (which I don't think) you know in what direction to go from there.
I got the TRK for my road bike to have a comfy saddle without the need for padded shorts.
My sitbone is a rather wide 130mm and it fits quite good. (the TRK is "160mm" wide. The useable surface is narrower.)
You have to get used to selle SMP though, it's a bit of a different feel of sitting but I like it a lot.