For sale is a new, never used, smooth 2" Crayford type focuser, typical WO piece of machining art, like that one on the picture. This was originally made for the WO102SD f6.8 refractor, do not confuse this with other WO focusers around.
It is fully 360 deg rotatable (great when your scope is on German eq. mount), has a focus lock and ca. 55mm focuser travel.
It would attach on the front via a 90mm diameter x 1mm pitch x 10mm height female thread to your adapter plate.
Great focuser to spruce up your refractor.
$150 plus change for shipping.