Need FMP runtime help!

We need a file to be made into a Runtime USR file compatible with 5.5v2. It replaces a USR file that is already compiled into an application. We have a binding key that matches the other compiled files.

Though we have FMP 6 it's not the developer's edition and we can't find anyone who can do this! Apparently FMP7 developer's edition won't produce runtime files compatible with 5.5 so we can't even buy it.

Let me know if anyone can help us out, I'd be willing to talk compensation for time spent of course. It's a 34meg file.

Thanks!