I'm not sure what model you have. "Jet Flo 240" gives me the idea that you have a canister model. Most hoses for them aren't available anymore. Check with vac. repair places in your area to see if they might have a used or old stock hose available.
www.vacuumcleanerhelp.com
January 2009
I can answer this question...
My Panasonic Jet Flow 240 has lost some of its suction. Where can I get a ?