CAT Rattling

[Marty]

hello, so im new to forum had my S8D2 for about 2wks, what started out like a tiny rattle which I thought was a loose heatshield turns out to be my CATs. The previous owner told me he had issues with the CATs and they were "removed" looking underneath, a frankenstein job has been done, opening up the CATs and rewelding them back up.

Im thinking I have two options:
1 - buy new CATs and get an exhuast fabrication shop to fabricate the exhuast section between the downpipes and the mid-section exhaust
2 - just fabricate a straight through pipe removing the CATs? could be issue with MOT?

Any experience / advice welcome.

thanks Marty