Hi All,
Gave up on my Exped mat because of the baffles going and making it un-usable and got a Thermarest NeoAir instead. The pump bag supplied with the Thermarest isn't nearly as good as the Schnozzle, it's thicker material, not a roll-top bag and smaller volume so feel like it takes more scoops to fill the mat.

I had a google and it seems there are some sort of valve adaptors available but I'm not sure if these work. anyone have any experience?

This doesn't answer your question at all...

I didn't even consider an adapter to get my Schnozzle working with my NeoAir, I just bought a BlockerLite Pump Sack. It annoyingly pops off very easily if you pump too hard, unlike the Schnozzle, but is suitable large and easy to use. However, I don't feel it's really robust enough to replace a proper drybag for use in my front harness, which is why I bought it in the first place.

I ised some pipe and gaffer tape functionally perfect aestheticsaly questionable.

To continue the theme of people offering alternatives to the question being asked, I use a Flextail electric pump!

I may have found a solution! It seems that the Thermarest pump sack valve can connect the Exped schnozzle to the Thermarest Winglock valve on the mat. I happened to have two Thermarest pump sacks because my first Thermarest was faulty and they sent me a new one, so I've chopped out the pump sack valve and trimmed it down so only the plastic that's needed is there. Problem solved!

Thanks all for your suggestions though