Increase 1st Gen Seat height when recovering?

The previous owner did an ok job recovering the seat on my '85 VF500, but it's already got some tears at the edges, the staple job was a bit of a rats nest, and the part around the tank doesn't fit very well.

I could order a VF500 seat off of ebay, BUT. I'd like to take the cover off, add 1" to 1.5" to the lowest part of the driver section to level it out a bit, to lift me up, and forward a bit, and then get the material to cover it myself, hopefully getting a better fit around the tank.



The key also doesn't lock the seat down right now