Greg,
> The file extracts without any extension on it, but has "sfArk" icon <
I don't know where you downloaded it from, but sfArk is a popular compression program and the program is therefore needed to open those files. I'm not sure if SfArk is even available anymore. If you email me from the link at my personal site
http://www.ethanwiner.com I'll gladly send you either the Bassoon SoundFont, or sfArk, or both. Let me know in your email. The SoundFont itself is just under 5 MB, and sfArk is 510 KB, so either can be emailed.
--Ethan