Good luck on finding the locks for a Seeburg  "L", and if you do,
please share the information with me.  I have found (with Dave Ramey's
help) two sources for those locks, only to have both companies go out
of business.  It seems that the last company to make these locks was in
Germany, and only wants to make them again with a very large order.
They were not exact, but were close.

The "Woodworkers Store" at 1-800-279-4441 has a hinge that looks
Seeburgish and works well.  The difference is it is brass, and the
hinge pin can be removed.  It is part number 25809 in polished brass,
and 25650 in Antique English finish.  These are the hinges with the
little ball on the hinge pin.

I used to make the name plate but the actual manufacturer will not make
any more name plates for me with other peoples names on them.  He got
sued for making name plates for some WW2 Jeeps.  Those were acid-etched
brass name plates.  Bill Toth (I do not know if he is still around,
but I hope so) also had some made and he may have some if someone in
So. California can help you.

The coin entry part is a hard piece to find.  At one time Blaze Tools
made them for William Edgerton but that was years ago.  I still have
some of the brass name plates for early Seeburg coin entry that say
"Drop one to twenty nickels".

Don Teach, Shreveport Music Co
1610 E. Bert Kouns, Shreveport,  LA  71105