You're sure it's _in_ the hose? Assuming you've not been able to suck
it back out the way it came in, I'd try the following:
Buy a length of BX cable, 20", possibly with thought in mind of using
it for upcoming project. Tape over one end, so no sharp edges are
exposed.
Use that end to push out obstruction, while vac is sucking on either
end of it.
I keep some odd lengths of armored cable around for just such
contingencies.
HTH,
J