I assume you have tried cd cleaners with little brushes that clean the laser. They have fixed a few of my friends players, one of mine in the past.
IF you have a player you really like the sound of:
Check on hifishark, your model(s). see if replacement head assemblies are readily available.
My Sony xa5400
Most pc shops or small electronic shops can replace them.
Replacing just the laser, calibrating it, that’s tricky.
I replaced one myself, got it to read stnd layer, but could not get it calibrated to find and play the sacd layer.