so i have 2 sets of twizy windows.
set 1, the nice renault south Korean ones, bough only a few weeks ago cost just under £400. only problem i forgot to take the little vecros sticky things of the car. but im sure some stick on velcros is cheap enough. postage will be a pain, but £250 with postage.
set 2, a pair of uk plastic zip windows, condition looks ok. sadly i never got a fitting kit with them £100 including postage.