You need to determine your focal plane and decide on how much travel you want before you buy any new focuser otherwise you may end up with the same issue. You can also loosen or tighten the primary collimating screws to move the focal plane out or as if needed.
Are the adapters you are referring to extension tubes? If not try a short extension tube but you could then be out too far.
Do you use a Paracorr or are you considering one? It needs some inward travel which may help you. If getting a new focuser and are considering a Paracorr you need to ensure you have the inward travel for it. A Paracorr 2 needs 14mm of inward travel from the normal prime focus position.
To determine your focal range (focuser travel length
/draw tube length when you’re shopping for a new one), first measure the position of all eyepieces you own. If Tele Vue then this info is available at
https://www.televue.com/engine/TV3b_page.asp?id=214
(Refer column f).
You could make a radius plate for your current focuser to lift it up a little, say 15mm but you’ll have to work the optimal distance out before making one. I made one for one of my telescopes out of a block of pine and painted it black. Measure the base dimensions and make sure the wood is big enough for the mounting screws. Drill a large hole to match the outer diameter of the focuser. Then you need a belt sander (bench model prepared) or if hand model clamp the job in a vice. You need to curve the bottom of the block to match your telescope tube and the top of the block to match your existing focuser base curvature. Drill the four mounting holes and job done, just paint and your set. (You will need longer mounting screws).
I made mine 35 years ago but these days a 3d printer would be the way to go if you can access one.
