What do you mean by fancy? Elephants' bloomers or just nice?
I have some simple voiles from John Lewis. They provide privacy and diffuse light nicely, without being fussy. Most people round here have vertical blinds and, even if I wasn't certain that the bys would destroy them within a week, I can't stand them. That said, you can get lacy ones, which are a bit nicer.
Well, I didn't find anything much in town so MIL suggested just some plain net from a place that does it for a quid a metre for the mo....that shop was shut & I forgot the extendey stick thingy to put it on so not very successful today
Might have a look for voiles on amazon shortly, see what's about on there.
I did a diy job - dont like nets particularly but needed something on windows. got some plain net, measured windows and attached plain panels with some velcro - cost me less than six quid and am always complimented on them