Silicon Intakes has aluminum V-band flanges, but I didn't see the right size on their chart, so I emailed them to ask if they had one that would work with the Tial MVS. This is their reply:
"Hello,
I have forwarded your inquiry to our Technical Expert and he has responded with the following:
Brand specific wastegate v-band inlet and outlet flanges such as Tial typically need to be purchased from the wastegate manufacturer. For example, although Tial and Turbosmart wastegate v-band flanges look alike they are manufactured differently and will not fit together or seal properly. Unfortunately, we do not carry these types of brand specific flanges.
Please contact us with any further questions or concerns.
Regards,
Joseph Covely
Customer Service
Silicone Intake Systems, Inc.
www.siliconeintakes.com
sales@siliconeintakes.com"
I suspect I would get the same reply from most other places that offer aluminum flanges. I'm going to take the new steel one that I ordered to the shop I worked at to see what a small batch would cost in aluminum. I know I could probably get a friend to make some out of scrap, but that would be frowned upon by the company and I don't want to get anyone in trouble.