In regards to a 3.2 Carrera manifold fitted to a large port (39mm) SC:
"Hi Kyle,
Yes we have the insulators. A set of 6 is $38.22. A set of 12 gaskets is
$29.64.
We look forward to an opportunity to help with your project."
Clewett Engineering, The complete solution for ignition & fuel injection
I know we're not supposed to post commercial ads but if our host doesn't carry it then Richard Clewett can help. Apologies for the plug moderators, delete this if inappropriate.