Went to Home Depot today in the plumbing section and asked around, still couldnt find any rubber 3"-2.5" connectors. I will try a local shop tomorrow, anyone have any more specific info on this little rubber part?
Most auto parts stores (in my area at least) don't have them since they are somewhat of a specialty item (intakes come with them already, and how many intercooler pipes does Pep Boys sell in the average day ?)