Large Brass/bronze Bowl How To?

[wallc]

I have been trying to figure out how to make a large "firebowl" for a client, and am stumped. I know how to do it manually (cutting shapes and english wheeling them and rewelding peices back together) but the budget does not allow for it. I have thought about sand casting, but the mold would have to be in three or four parts (most likely four) but making the form and then re welding after shrinkage and growth, may also be cost prohibitive. Does anyone know who spins large bowls, a small shop perhaps, or who may recommend a better, more efficiant way to do this? BTW the bowl is roughly 5'0" diameter, by 14" deep, and has a flat spot for sitting, and a turned over lip. Please help, as I have not been sleeping for the last few days, trying to figure this out. I thought I had the smarts-guess not.