Is there a doctor in the los angeles area who will give the guardasil quad-strain vaccine to a 40+ y.O. Male for a reasonable cost?

Gardasil. It is not approved for after 26, not enough studies.
No. There may be a physician but not very likely. The typical cost for the medication is $200 per shot and you need 3. You might be able to get it for cost and just pay the administration fee but i guess it depends on your definition of reasonable.