You want to try finding a BX in the scrappys round here - no bloody chance - and even if one did turn up it would be there for as long as it took to de-poloute and then it would be off to China in a crate.
The best chance for spares now seems to be buy an end of life one off fleebay and keep it for bits (fine if you have the space and an understanding sympathetic partner like Jon & Mr. B....)( I mean Jon & Mr. B's partners are sympathetic, not that you have Jon or Mr. B as a partner.... I will get me coat)