Thank you JacM,

http://www.outdoordesignershade.com.au/ solved my problem, i ask them as your suggested and they came to my home end of the last month and they made to measure our old window blinds. Now it looks cool. As you suggested JacM my venetian blind are now white colour from inside but outside is dark wooden colour.

cheers

Thank you JLtarra,your advice really workscheers