light tight louvre vents in uk

hi all, as the title says ' where can i get light tight louvre vents in the uk'. i have looked at the darkroom supplies stores online and just cant seem to locate them here in the uk.

any help or links would be much appreciated, peace out

Are you going to use these with your fans?

Focus DIY have some gravity vents that will open when the fan blows but close when the fans are off. You will find them next to the bathroom extractor fans. Not exactly lightproof but good enough.

Hope that helps.

thanks for the thread, but what i was after was the actual vents used in dark rooms, but from a uk retailer ( spend our way out of recession ).

these vent are going to be fitted on to a wardrobe, acting passive with a 300cfm ruck for extraction.