I think they (Nok) had one maybe two Boeing Company NG guys come along in the past when they initially got the NG to train locals, they've definitely gone now. From what I've seen here and heard of there, I very much doubt they will ever need farang for more than those sorts of duties.
Got a mate who just joined Pete Air/Scoot, PM for more info. You could try Orient Thai if you are 73/76/74 rated, PM me for contact details of CP for 73 fleet. City Airways is another option if you are 73 rated, although they've just had their HKT service pulled by the Thai DCA, not sure the reason yet though.
Cheers.