It's not clear whether you have an NPE-300,400,G1... However, since you only have a single upstream transit provider, you don't need to carry a full bgp table. Ask your provider to send you a default route (0/0) and their internal routes only. This...
You may not be able to find an exact match. But if you have the measurements and electrical characteristics, you can probably find something similar for $10 on digikey.com, mouser.com, etc...