It may be cheaper to look into the federal premium loads with the flight control wads: https://www.federalpremium.com/produ...ll.aspx?id=835. Same wad used in the blackcloud waterfowl loads. With how few will be shot, it may be a lot cheaper than getting a turkey choke. There's a mail in rebate on them now.

If you are set on getting a choke, Carlson's sells a flush mount turkey constriction.