JennyJ,
I too am very allergic to metals. I decided not to get banded because of the titanium and stainless steel component in the Band. Even though you can get lapbands that just have titanium and silicone, and even though everyone keeps swearing to me that titanium is an inert, non-reactive metal, I do not believe it for a second. Titanium is an amalgam (composite) of metals that ARE reactive, and therefore i believe it itself is reactive too.
Anyway, in the past, when i've had metal poisoning issues, I underwent Chelation IV therapy. This helped a great deal. You can find out about this from most naturopathic doctors. If you live in Toronto, I could give you more details about where to find chelation doctors.
All the best.