What Companies Offer Refresher Courses ?.....For Used Truckers lol.

I am asking this question because it has been a while ( 11/07 ) since I last drove for a company. I had to leave Trucking due to a MISDIAGNOSED MEDICAL CONDITION,which I'm Currently Resolving ( I should be completed before my next D.O.T. Physical 5/2011 ).My License is currently up-to-date.

I was just wondering if there is a list or something available to help Me in My search. Thanks for any help You may offer. Ken D. Tucson,Az.