Where can I have my Modern Maid Model KBT100 repaired? ?

My built-in-the-wall Modern Maid toaster no longer toasts on half of the toaster slots; there are slots for 4 pieces of toast. Only one side (for 2 slices) still works. I think maybe there's a short in the elements. Also, the automatic pop-up no longer works, so I have to use a timer so that I don't burn the toast.

I've been told that parts for these toasters (it was installed in late 1970's early 1980's) are no longer available.

Do you have any suggestions or referrals for a repair shop? We live in the West Los Angeles Area.