Can it be done?? Rework frontend to Web..

I assume it can be done but at what costs *hrly/daily etc.) and where do I go to find a qualified person(not me for sure) that can do it.
I have a database (30-50 mg) on an SQL 2000server. The client side software is written in VisualBasic. Every time I need a change our developer charges an exorbant fee and takes weeks. I need someone to rewrite or create from scratch a complete web enabled feature to access, update (depending upon users). This frontend now saves a local copy of the database on each workstation in an access type file. Unfortunately, we own the frontend but do not have access to the code… just the compiled version. I would even entertain thoughts about moving our database over to MySql (the thoughts of upgrading a future MS version makes me ill.