Threaded Chokes for Browning A-5

[The Cold Lake Kid]

I have a Belguim Browning A-5, full choke, vent rib, capable of handling 2 3/4" and 3" shells, .
I would like to start using it again for ducks and geese, shooting steel shot.
While locally, I can get it re-bored to modified, I would prefer to have choke tubes, thus allowing me to continue to use it for turkey etc, switching to full choke when appropriate.
Any ideas who can do this kind of work?
Thanks

 

[guntech]

Usually the older Belgium shotgun barresl are too thin for tubes. I would suggest opening it up slightly more than modified.