In a PDGA event, unless notice is given before hand, the TD is required to offer a division if 4 people who qualify for the event and the division request it. If TDs in your area aren't offering pro masters, just find three other 40+ players who will stand with you and request it. The TD cannot refuse your request. If he does refuse to offer the division, report him.
J. A Tournament Director may, by giving adequate public notice, restrict the divisions offered. Absent such notice, the director shall offer for competition any division which has four or more players that are eligible and wishing to compete. Tournament Directors may offer divisions with less than four players at their discretion.