@Lardog I bought the mufflers about ten years ago, one year after I got the car, because I knew I wanted that Mind Train look. Time flew by though, and it wasn´t until the just finished restoration the idea came to fruition. Looking at FK Automotive´s website now, they have gone in a different direction. However, I did a Google Lens image search, and found the same muffler, rebranded, I guess. It seems a common name for it is Pan2000, I´ve seen Sumex Pan2000, but also the name DTM Look Double. Where to buy? Now, I´m not sure. It says out of stock on Amazon Italy. A couple of sites here in Sweden "seem" to have it, but those sites look kinda fishy - selling foods and health care as well..!?
Sorry I can´t be of more help.
Another route could be to find a couple of shorter bullet style mufflers and have someone weld a Y-pipe to the inlets, add a bracket in the middle and a couple of slash cut pipes. Pretty much what I guess Mind Train did.