Help in SC for repair man

My mom passed away and I now have our old Magnavox Astro Sonic Model# 1P3813 Serial# 1646890. I have the original bill of receipt from 11/12/1968 and she paid $513.46.

The radio still works and the speakers are probably loose they kinda come and go, but the stereo part is in need of help. Does anyone know where I can get a repair man to come and fix this? Can we take the stereo part out and mail it out to be repaired? Is there anything that can be done?

Thank you,
cathy