I looked into this a few years back.....I never managed to find anyone that was making them for the longer rails.
I toyed with the idea of buying 2 of the 1400 rail bags, un-stitch them and then having the 2 of them stitched together to make a longer bag, but my mates wife (who is a real dab hand on a sewing machine) took a look at my other 1400 rail bag and seemed to think it wasnt feasible , due to the way the bags were made originally....
Admittedly, as I said, it was a few years back and I haven't looked into it recently.
I have a 1900 rail, a 2420 rail and a 3000 rail, amongst others but I wanted the longer bag for the 1900 & 2420 rails.
The 3000 rail came in it's own wooden box and on the rare occasions I need to take it on site, I just transport it
in it's original box.
Does the 2700 rail not come in a wooden box...? Or is it now just cardboard?
Edit. It's real easy to make a wooden one from hardboard and a couple of bits of MDF, as that's all the original 3000 Festool rail box is made from...