Nope. If you can figure out a way to get your Quark file saved down to version 4, then you can just open up the Quark 4 file in InDesign. Or you can give Markzware money. Markzware is pretty overt in posting on the forums that when someone takes you up on your $40 offer that they are in violation of their licensing agreement w/Markzware.
I can open and down save it, then get it into ID for you. I have a few versions of Quark installed.
I have never gone this route and don't know the quality of conversion, however. Don't have markzware's stuff.
Gratis. No charge. Zip. Buy me a coffee sometime if we ever see each other.
Upload it to dropbox.com or your own server and PM me the link. I will be out golfing the remainder of the day and can see how well it goes later this evening.
Mike, you're a gentleman.
Brainfillet, you better post when you buy that man a cup of coffee.