Thats tough!
www.aviationjobsearch.com Join up to get email alerts. (I start next week as a direct result of one such email)
www.flightdeckrecruitment.com As above but a small charge. Worth it though as they get access to jobs not yet openly available
www.flightglobal.com
These will give you links to all the recruitment agencies own sites.
Finally, have faith!
Good Luck!!!!!