FN2 Exhaust Tailpipe fell off!

This is the current status of my right rear tailpipe:


Shortly after purchasing my 2010 Type-R FN2 the right tailpipe fell off the exhaust system (it unwelded, most likely), which now causes strong vibrations to the car on the rear right side when sitting still. How can I fix this? I do not have access anymore to the part that unwelded, so I am considering one of the following options:
1. Replace the entire end of the right exhaust pipe (found this, but it's a little too expensive for my taste)
2. Replace the entire exhaust pipe system with an aftermarket one to prevent any other parts from suffering the same fate (definitely works but it's over 550 pounds)
3. Other suggestions?

I am looking for the cheapest possible option; I do not feel the need for an aftermarket exhaust system unless mandatory, as I am happy with the stock sound.