Looks like you have a kink were the metal pipe ends. That's where the hose
will fail first after a while. How about finding or making a coil with thick
wire? The smooth galvanized wire they use for stretchers along the bottom
of chainlink seems to be the right size and stiffness. Bend it around a pipe
or dowel (a little smaller than the I.D. of the hose to allow for
springback). Bend the ends over on themselves after taking off the sharp edges of the
end cut, and screw the "spring" into the hose, lubricating with soapy water.
I've seen radiator hoses with this kind of spring inside, but I don't think
they make them anymore. Good Luck! Bernie