Hello Warner,
I just wanted to remind you, that if you in fact have 50 or more users that will be using this system, you really should NOT be using Microsoft Access, and should be using Microsoft SQL Server or MySQL Server. When you have that many users reading and writing to the database at the same time, you can have all sorts of problems with it later on.
As far as the actual script is concerned, it really should be fairly quick to write this from scratch, if you were to code it yourself, so I recommend that you either code it yourself, or have someone else custom code this. Feel free to email me if you need someone to code this for you (for a small fee of course).