I would be very careful getting a TR or paying for line training at the current situation. We are facing what is so called a recession, I belive that we are in it right now. People are not traveling as they use to, and oil prices are increasing so not many airlines are recruiting at this time. I belive this will change, but when how knows!!
To answer your question, there are couple of agencies still recruiting on the 737 NG. Rishworth are collecting CVs for an airline in South Korea, no names here!!! and also collecting for a company in North Africa.
Parc are recruiting 737 pilots for a company in Vietnam, and as you mentioned Ryan Air is hiring for their Europe base.