One alternative I’ve been hearing good reviews about is Talent Testing Services:
8444 Reseda Blvd.
Northridge, CA 91324
1 (818) 885-0812
9:00am-4:00pm Monday thru Friday
Saturday By Appointment Only
But make sure ahead of time to contact everyone involved in your future shoots as to what protocol will be taken when it comes to testing. Do not get bullied into shooting anything without your co-stars being properly tested. Your life is on the line. Stand up for yourselves and do not perform anything without seeing for yourselves your co-star’s test results.