I have a pair of heating / cooling ducts I would like to reroute. They are
laying on the attic floor between my pulldown steps and the main storage
area, and I'd like to make them go up about 5 feet and over to provide a
walk through. As it is I have to set stuff on them as I transfer items to
and from the storage space (not good - I'm careful not to bend them but it
might eventually flatten or tear the insulation).

There are 2 ducts, one is 12x12 and the other is 12x14. The box stores only
have flat sheet metal and I don't have a bender or anything. What would be
a recommended plan of action? Will the additional 10 feet of travel and
additional bend make much difference? Would this be a costly job for a tech
to come out and do? Could I rig a useable bender (brake?) using a wooden
frame?