We visited Ypres while on holiday this week and I paid a visit to a shop a couple of hundred yards from the Menin Gate, between the Cloth Hall and the Menin Gate. The stuff it sells appears authentic although perhaps a bit pricey. Interestingly there was a No 213 fuze dated 1947. I didn't ask about FFE certificates as I decided not to buy anything, I much prefer to find my own inert stuff so that I know exactly where it comes from.