For people who are building applications with Net::Z3950, support is available on a variety of levels.
You can download, print and fill in the contract and post it back to Index Data; or if you have any queries, email them on <info@indexdata.dk>
How can I say this tactfully? If your problem is one which, to solve, would require me to do fairly major work on the module, then I am more likely to find the time if you have a support contract :-)