The range of nbb pistols is definitely a fraction of the size of the gbb market, I guess most people prefer blow back despite the disadvantages (and I'm certainly one of them). I don't think there are any nbb 1911s available but there is a Makarov
https://www.actionhobbies.co.uk/products/kwc-co2-makarov-airsoft-pistol-nbb/
I've no idea what they're like though. I've never owned one as they're way too overpowered for skirmishing at over 1.5j but if you only want it for plinking that isn't an issue