To give him the best chance OF being able to get a re-entry permit for you I'd say have him get a "power of attorney" [หนังสือมอบอำนาจ] form (all thaiz know where to get them), fill it out saying you give him the right to apply for a re-entry permit for you and put two 5 baht tax stamps on it [แสตมป์อากร].
If that won't work nothing will
OR
you could just buy your re-entry permit at Suvarnabhumi before you fly out (they're open
****
selling them to people flying out)