If someone decides to give up on their Isuzu regulators, you could install what the custom car & hotrod folks install. Those kits are pretty generic and will let you put the support under the glass where the glass balances, and it can be shimmed away from the inner door skin until it is parallel with the track of the window.

Something like:
http://www.specialtypowerwindows.com/streetrodkits.htm

Or:
http://store.summitracing.com/defaul...LI-CR45-6670-K

-Tad