Jack, Can't help you with the LH grip but if you have a RH grip for a BT-99, I am interested in it. OtH
I may be able to help you out, once I get a lefty grip. I ran into an eye issue, I shoot one eye righty, developed a macular hole in my rt eye.. so I'm learning to shoot lefty.. once I get a lefty grip. I'll let you know