Hi. I just upgraded to the 10:1 so now I have a spare standard focuser off my 12" Lightbridge. It is exactly the same as this one here:
https://www.bintelshop.com.au/Product.aspx?ID=6920
I believe it is the same as the Bintel/GSO and should fit any of those. I know there have been one or two up here alreadt but I don't know how well they did, or if there is anyone left that wants one, I thought I'd try anyway.
I'm going to ask $50, including regular insured postage to anywhere in Australia, with the original 1.25" adapter and "end cap". That's less then half current price which I think is pretty fair.