Just recently I required my 800RE seat modifying. I contacted a chap known on this site, a few years ago, who has been recommended by many for doing a good job.
He took a little while to get a date sorted, but Christmas, New Year & a house move got in his way. However once the date was confirmed I posted the seat off to him & it was returned 7 days later.
I required comfort foam for rider & pillion, plus the pillion area raising 50mm. He also widened both sections & flattened the riders area out a little. The cost included a new non slip cover also.
I had a Top Sellerie seat on the 650 for a couple of years but the comfort of this modified seat is better.
Total price including return postage was £140. (bargain)
Contact Tony Archer on 07305 744141