Can anyone help find big, thick silver tubes for a superconductor lab?

Hi all, I got an odd email from a superconductor lab asking me
if I could supply silver tubes, so I thought I’d ask the group,
if you know where they can get these please email them off list
and tell them. Thanks! Charles

Her email is:

Zampiceni@europametalli.it

we'd like to receive your best offer for Ag(99.9%)Mg(0.1%)
tubes with the >following caractheristics: OD= 15 mm >ID= 11 mm
L=500 mm Anyway if the requested diameters are not available,
we'd like to receive >an offer for the available ones. Thanks
in advance Best Regards Dr. Elisabetta Zampiceni 

Europa Metalli
Superconductor Division
Via della Repubblica 257
55052 Fornaci di Barga
(Lucca) Italy
email: Zampiceni@europametalli.it
tel. 0583-701470
fax 0583-701471

Charles Lewton-Brain
Box 1624, Ste M, Calgary, Alberta, T2P 2L7, Canada