lush4111 wroteHi Andrew P,
You will find heaps of YouTube videos for this. It is the plight of almost every motorbike rider!
I have made a number of easy seat modifications for bikes in the past easily and inexpensively.
The best solution (for me so far) has been to get a piece of waterproof fabric/vinyl and cut it to the shape of the seat making sure there is enough of an overlap to wrap around the underneath the seat (this is where you will staple it to the underside of the seat.
Then get a slab of medium density foam and cut that to the same size as the seat.
Place the foam on the seat with the new fabric over the top. Pull the fabric around the underside of the seat and staple into place. Do this all straight over the top of the original seat. That way you can remove it at any time and restore it to its original condition.
If you want someone else to do this for you, you won't necessarily need a motorbike shop or upholsterer. Just someone with a pair of scissors and a staple gun. I bet if you can find a fabric or even curtain shop they will have all the items and skill you will need.
Good luck and comfy riding.
Thanks for the tips and ideas,
This morning I bought one of the black stretch/mesh style seat covers and cut some foam from an exercise mat
that slips underneath for the longer rides. - seems to be an improvement
Ill see how it goes.
Cheers