Here are just a few suggestions to help you in your search. The Sunday classified ads are a logical place to find job fairs, and while technical jobs are usually the focus, that's not always the case. They can also be fun, and offer you rapid insights on how companies portray and market themselves as employers. They are often good sources of advice on the job market overall. You can also select which one you think might do the best job for you after visiting a few of them.
Agencies vary in quality dramatically, and even from recruiter to recruiter inside each firm.
It may only be access to their listings, but they can also be great sources of information and research for you. These include professional association newsletters and specialty magazines. There are probably Internet postings that you may not have uncovered as well as company Web sites. I'll also take it on faith that your resume indeed passes the right tests. You'd be surprised how many resumes get knocked out of the box not just on the basis of content, but on the basis of format, typos, sloppiness, etc.