I put my pillion on her own bike. Very comfy she says.
That's what I did too, but BEFORE that,
I bought a seat off e-bay.
First i went around at work and found the most comfortable pileon seat in the lot.
Kawasaki vulcan I think it was called, anyway went and tracked down the owner of said bike
he called it a wide body seat for his girl.
Came home e-bayed it for $14.00
It came in and I cut the mounting frame off the OEM seat,
welded it on to the wide body and the daughter was happy.
The lines even fit the back of the solo seat.
Still got it if you'd be interested.