I can't argue, the G10 D'fly is a great handling little knife, and I also agree it would fill a niche for the UK market. Let's hope Sal and the gang hear your cry!
Regarding the Grasshopper, I like the shape and size was EDCing it a lot more when I first got it. I've recently gone back to using the H1 Ladybug as my backup EDC mainly due to it's ease of deployment compared to the Grasshopper, which is much stiffer and doesn't have as big a Spydie hole for one-handed operation.
Take care!