Which roofing manufacturer[s] have membranes that utilize Evaloy ?
My KEE preference is Fibertite - http://www.fibertite.com/. Good track record. They may try to get you to go with a lighter membrane thickness (36 mils) if you’re putting this in as an alternate to 45 mil PVC so they can stay competitive (see their competitive comparisons webpage). That’s an entire discussion in itself.
Cooley, Flex, and Tremco also offer KEE membrane roof systems.