TORS install - Classic with 3 mufflers

iirc Colin (battersea) did. had a Classic with twin tails.
 
I foolishly ordered a set of TORS mufflers assuming they included the midpipe. My 06 Classic has the 3 muffler setup and I don't like the looks or sound of it. Can I buy the parts I need or should I just return or re-sell the mufflers?
You could buy the 3rd TOR and the bypass pipe, either from Triumph or 3rd party. That would be less money than a custom header . and muffler and easier to adjust the tuning.