I am currently repairing a Beolit 707 that I obtained for a bargain some times ago.
It required me to 3D print a replacement tone slider, replacements for the tabs at the bottom of the side panels and also the little clamps that holds the bottom sliding plates.
If your Beolit needs any of those, I have made the models, pictures of the parts, and the Freecad project file available here :
Location: France
My B&O Icons: