2000 E320 4matic plugged catalytic converter.

[92300SE]

This morning my front cat,drivers side,got plugged while cruising on the hwy...so,I crawled home at 20mph and I am trying to figure out if I need a direct fit,or a independent muffler shop can put a generic one in place.I know that the rear ones are easy to replace with generic,however,never had to replaced the one in the front before...any input will be helpful,thanks.