I suggest looking at a Freedom Air or Airhawk R seat pad. Both of the are inflatable which will raise you approx 1/4-1/2 inch and are designed for people with tailbone pain.
This will get you through until you can find a seat customizer that you can take the bike to. This is the preferred method because they can fit the seat to you and you can test fit it while they are rebuilding it to make sure it's going to work for you.
Retired USAF, IYAAYAS!
2008 V-Star 1100 Custom Bobber project
2011 Crimson XR with Forged Highway Bars / Hard Bags / Passenger Backrest, Ness parts including Smooth Layback Plate Frame/Mount / Rad 3 Mirror / deep cut grips / drivers floorboards /shifter peg / brake peg / passenger pegs. Witchdoctor black rack, Lloydz filter / timing wheel / VFC III, 7Jurock windshield, Drag Specialties seat.