In Keith's video ASSEMBLING A HIGH QUALITY MODEL STEAM PLANT - PART #16 he discusses a set of BA wrenches that are available from Blackgates.
Living in the U.S.A. I have acquired a number of English Steam Projects. To date I have not found an American supplier that could help me with the BA stuff.
So I ordered the ones in the video. I was contacted by
Jacquie from Blackgates the next day and thru the wonder of the internet they should be here this week. Total cost in the USA with shipping was $14.00.