Originally Posted by Air&Road

Do you mean for making a lip for mating sheet metal panels? If that's what you need I can look through my Dad's tools. I think he had one.

That said, do you have a MIG welder? I prefer to mate sheet metal with a butt joint. Fit it well with about 1/64" to 1/32" gap all around. Get it flush and MIG a tack using shielding gas, NOT flux core. Bounce around spreading the tacks all over to prevent warping. Keep filling in between the tacks until it is solid weld, then grind it flush. The beauty of the MIG welder for this purpose is that you can weld over weld without chipping slag or otherwise cleaning.

Let me know if you need the tool I describe. I will be at my Mom's house Thanksgiving and I can look through my Dad's stuff for the tool.