Some agencies will not provide T&C info until you sign up with them, slowly things are changing and some agencies are now putting up T&C's on their websites.
Happy to be corrected but my understanding is that the basic T&C's will be very similar for all agencies - logical really as Airline X will only provide a certain amount of $$ to any of the contract agencies they use, there may be differences between agencies in "add ons" like medical coverage, Loss of Licence availability etc.
Not recommending (or otherwise) any agency just pointing out availability of info:
- CREW for Peach;
- LONGREACH for Asian (primarily but not solely Chinese) ops.
Sure there are other agencies as well.
Cheers
