I think that writing a 60-line Perl script to emulate wget at a client's request would be dishonesty by omission. If you're interested in developing an honest, healthy relationship with your client, tell them about free software that may meet their needs. Explain to your client that there's this free program named wget that has some/most/all of the functionality that they want. Explain that you could write, test and install a specialzied wrapper script around wget that will about 2 hours. That way, you still get paid, you retain your credability and your client is both happy with your work and impressed by your knowledeg.