Are there any aids (like a padded "belt") that can ease hip discomfort during aerobatics? When flying aerobatics, particularly maneuvers such as a slow roll, I frequently experience rather high discomfort on my jutting hip bones.  I've googled "padded belts" but I have not found anything that would seem to help.  Is such a thing an actual product, and if so, is there a proper term I could search for?

Basically, I'm looking for a garment/belt I could wear that would provide sufficient padding around my hip bones to mitigate this discomfort.  (The discomfort is caused by the tight seatbelt combined with negative G's -- the belt itself is standard issue on a Pitts Special.)
You can try out a padded harness which may help, a variety of places mention the stuff offered by Hooker Harnesses and may be what you are looking for. 



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If you currently only have a lap belt installed in the aircraft in question you may want to consider 5 point harnesses as they can help by moving some of the load to your shoulders.