Thanks for all the suggestions. Had a little trouble finding the 6" DC hose at several places (although 4" is readily available).
A WW buddy pointed me to Wynn Environmental out of Penn.
They had the hose that I wanted at a reasonable price and would ship a 10' section UPS which Oneida would not do.
They also sell a neat retrofit cartrige filter for single stage bag filters like my Grizzly.
http://www.wynnenv.com/35A_series_cartridge_kit.htm
I would be curious to know if anyone has any experience with such a kit and any real world advantages.
Thanks again.
-Jim