You can still shoot invitational. I've shot several of these and had a good time.
2.1.9 Manufacturer’s Representatives: Regardless of other category eligibility,
individuals who are members of a manufacturers’ shooting team, sales or product
representatives, or professional shooters, must fire in the Invitational category.
2.1.10 Invitational: At the discretion of the Match Director persons who do not meet TPC
eligibility requirements may be allowed to participate. These may include volunteer
match officials, match sponsors, and firearm industry representatives. Invitational
competitors are not eligible for awards, plaques or prizes. Recorded scores are
normally maintained and published separately from regular competitors.