Hmmmmmmmm ... unfortunately it sounds like that Blackley company is the UK version of the looooooooong wait
we here in the US have with The Rifle Shoppe (TRS) company!
Now I myself wouldn't mind it sooooo much if TRS at least gave one a somewhat accurate picture of the wait or purchasing/pipeline challenge - but they don't. We have been told
'you'll have it in 3-weeks' only to get (hopefully!) 8-months later, and that was just 1 recent example Ricky-StL faced. But when I needed another casting a few months ago, I'd rather they say up front
"We are out of stock on them and don't order them until we receive active orders for 6 (or 8 or whatever#) of them and you're #3 on the list ... so it could be a while".
Then at least I'd know that I could be dead before my heirs got the part, LOL! 'Nuff said ... rant out ...