The good news is that the task you want to perform is a pretty straight-forward and common one. I think you're after ...
- An HTML 'submit my data' form
- A 'write the submitted data to a database' script/routine
- An HTML 'search the data' form
- A 'search for the submitted item and display the results' script/routine
The bad news is that this will involve a degree of work. You won't be able to simply 'plug a script in' to your site - you'll need to investigate what databases / languages are available on your server, design a database that's relevant to your needs, and at the very least do some customisation to a pre-written script to enable it to run. There *are* many scripts around that perform the basic functions listed above, but somebody will still have to get their hands dirty writing HTML, connecting to the right DB etc.
It's *possible* you'll find a volunteer here (and generally, they'd reply to this question rather than emailing you), but failing that, I'd suggest you find some basic perl/database tutorials...here in the Monastery or elsewhere - there's bound to be enough well-explained example code around to let you paste together something that'll suit you.
Cheers,
Ben