Silver supplier question

I have a question that the group may be able to answer.

I am currently pricing a commission for a fairly complex set of Shabbat 
candlesticks. It is still in the design by committee stage, but it
involves 
hammered silver reflectors.

Originally the reflectors were a series of curved plates 3"x10".

In as much as maintaining reflectivity was im****tant. I suggested using 
Argentium silver. With such a  high silver price, the premium is a much 
smaller percentage of the cost and it seemed like an ideal application.

Then the designed changed. The reflectors were now a few plates 6"x10".

"No problem", I sez, "I can use standard 6" wide Argentium sheets".

Now that the customers are all hyped up on Argentium, they decide they
want 
the reflectors 8"x10".

My question is:
Does any know if someone is producing Argentium sheets in wider widths?
Preferably here in the states.

There are some creases in the reflectors where I can hide a seam, if I
have 
to, but I would really rather not have to solder 2-8" joints in each
panel.

Paul K. Dickman