Photoshop :: How To Create Action To Insert Hundreds Of Different Numbers For Limited Edition Prints

I sell limited edition prints of a run of between 350 and 500.

I am trying to get it set up so that my signature and the print number is included as part of the print. Here is an example:
 
You'll see at bottom left there is my signature and underneath is is the print number e.g. 110/350 (this is legible when printed at 18x12" size).

Inserting the signature and the "/350" is easy since it only needs to be done once per image.

The difficulty comes with inserting the actual print number e.g. "110"
 
At the moment I have 0 to 9 written out and scanned in as separate numbers. So to make "110" I use the "1" digit twice, plus the "0" digit. I.e. I haven't written out 1 to 500 and scanned them in all as separate numbers, I've just done the 10 digits and use those 10 digits to make all the different numbers I need.
 
Is there a way to create an action that will create say 350 JPEG copies of the original file, each one with its own unique print number inserted? (And ideally automatically saved with the print number as its file name!)