Not up to speed with a TIG welder, I have a MIG welder that's takes either gas or gasless wire and it works 110% better using gas and I can weld pretty thin material ie car body.
I would be brazing that though Gil.
By the look of the price of the item, I'd personally take it to a couple of metal fabricator shops and see what they say and get a pro to do the job.
Think I'd have to agree with Jim on this one .... looking into professional service might well be the best idea for such a job!

Logged
"Information is not knowledge, Knowledge is not wisdom, Wisdom is not truth, Truth is not beauty, Beauty is not love, Love is not music: Music is THE BEST...
Wisdom is the domain of the Wis (which is extinct). Beauty is a French phonetic corruption of a short cloth neck ornament currently in resurgence..."
F. Zappa ... by way of Mary, the girl from the bus.