Did you try a Salvage yard.
You can find this vaccum hose on a ton of 5.0 engine. Crown vic, town car, cougar and t-bird's. On mine, i've found this one there.
Others strait line at my ford dealer which is on lockout now
Anyway!
for the link this is HTML
got to ''The Mustang Message Board > User Control Panel For White GT > Edit Profile'' and take a look at the ''vb code'' link.
hope this help.