Yeah, the x1.6 Barlow lens is available from the UK.
I’m not home at the moment to confirm supplier, but give me a day or two and I’ll find it.
(I actually have two of them, drop me a PM if interested.)
EDIT
Found it!
AE #AC555 x1.6 MagniMax
From Astroboot.eu
Contact Anna at
info@astroboot.eu
(Mention my name !)
Very reasonable postage.