As far as I am aware the only known possible example of a original BFC tunic was held within a school in New Zealand some years ago and eventually disappeared. I do not know the full story however there are members of this forum who will undoubtebly fill in with the details.
The existence of the bfc has been common knowledge in the uk for many years amongst those who have an interest in the subject. many articles have been written. The fact is the BFC were never numerous i don't think the number ever exceeded 30 members and they were more of propaganda use. There is quite some controversy as to whether or not any members actually saw combat.