Yes, Jethunter,
There's Kent/Gamebore, there is also some Fiocchi/Mike floating around (I have some in 16 Ga 2 1/2") and Sellier & Bellot also make 67mm shotshells.
Under CIP there is 12/50mm SAPL (12/2.00" SAPL), 12/60mm (12/2 3/8"), 12/65mm (12/2 1/2"), 12/67mm (12/2 5/8"), 12/70mm (12/2 3/4"), 12/73mm 12/2 7/8"), 12/76mm (12/3") and 12/89mm (12/3 1/2"). Not counting all the other possible gauges, 4, 8, 10, 12, 14, 16, 20, 24, 28, 32 and 410, wich are all standardized under CIP.
Nominal CIP chamber lenghts (not counting the cones, only the cylinder part) for each are;
12/50mm = 50.10mm +2.00mm
12/60mm = 60.10mm +2.00mm
12/65mm = 65.10mm +2.00mm
12/67mm = 67.60mm +2.00mm
12/70mm = 69.90mm +2.00mm
12/73mm = 73.00mm +2.00mm
12/76mm = 76.20mm +2.00mm
12/89mm = 88.90mm +2.00mm
Lots of fun there.
Sweden did not enter CIP yet.
The lenght marking is not mandatory for non CIP / SAAMI manufacturers; hence this un-marked 1953 Husqvarna model 350, considered as a modern gun (it's a 12ga, 2 3/4").