Hi @phonesandbones
Im not sure what parts, It would be good if you can provide some good pictures,
Some ways I think you can work with is to replace the whole part, which you can search by part number.
It is also known as traverse mechanism
https://www.google.com/search?q=traverse+mechanism+optical&rlz=1C5CHFA_enSG846SG846&sxsrf=ACYBGNQGkZQhXFJNx3M1_J0fgA5CGWaHaw:1574473622531&source=lnms&tbm=isch&sa=X&ved=2ahUKEwisruqnm__lAhWJyzgGHW-eBlsQ_AUoAXoECAsQAw&biw=1440&bih=757