Having once suffered massive loss of sex drive due to prolonged AS use, i sympathise entirely.
Ultimately the only real solution for re-establishing endogenous testosterone function is time off AS. In my case it took over six months and was a full year before it became "normal" (regular sex and at least one wank daily)
However, i have found several products to be of use is assisting re-establishment of natural test. Clomid and provirion are the staples, used for the last 10 and 14 days of your cycle respectively (bearing in ming the half lives of the AS you've been taking) and the use of a good TT supplement in conjunction with DHEA is about all you can do to help things along.
The only real solution is time off though....
You may be interested to know that during an AS cycle, Brian Batcheldor recommends a product used to treat prostate cancer, know as Buserelin or Suprefact. It acts but down regulating LH production, but also exhibits a blunting effect on the suppression caused by exogenous androgens, therfore creating a superior rebound effect post cycle, when the drug is dicontinued.
It can however, cause sterility (as can excessive use of HCG) so is not without it's risks as well.
Again the safe option is more time off between cycles....
Peace
eudemonia