Hi all.
I'm fixing up a friends 8" F/5 skywatcher newt & I'm after one chrome knob that screws onto one of the spider vanes.

(its been lost)
Also, it has a weird focuser on it. I'll be the first to admit I know zilch about most scopes, & this is the first Skywatcher I've clapped eyes on. It has a 2 1/4" focuser? None of my 1 1/4 - 2" adapters fit it, and thats whats missing, the adapter that fits in this odd sized focuser so it can take 1 1/4" eyepieces.
Anyone got any spare parts? Or know where I could get some?
Cheers for any help.