The Estralis Continuous 50/140 is pretty similar. Same oestrogen, slightly less progesterone. (Evorel Conti is 50/170, usually, I believe.) The Estralis
leaflet says keep in a cool place out of sunlight - don't put on windowsills etc.
Alternatively I just ordered 12 weeks of Evorel patches from White Pharmacy online for £37.95 - although I'm waiting to find out if they actually have them in stock. (That's 24 patches.) Fingers crossed.