Help in finding appropriate tube for a scope

This might be an open ended topic but we need help.

We are in the process of restoring a cassegrain (relay lens) telescope. Unfortunately, the telescope's tube does not seem salvageable.

Any recommendations on where can we go for help in replacing the tube, either as a purchase or custom made. The dimensions of the tube are shown in the attached picture.

Here are some criteria for the tube

=The telescope will be mounted on a fork so the tube needs to be strong
=Preferrably made of light material
=Must have provisions for the truss tubes for the secondary mirror
=Corrosion resistant as much as possible (will likely be stored in a shed
=Would be great if it can be painted, unless it's black
=Limited budget

Any ideas on the truss tube as well, very similar criteria as above.

Thanks
Ed

Attached Image:

Hi Bill

I saw your email as well on UACNJ. Thanks for the info. I'll respond to you on that channel.

But you are correct in that this is Roger Tuthill's telescope.

Thanks
Ed