You can use what basically looks like contact paper (i.e. the stuff used to cover books in primary school) to make clear glass windows look frosted. Something like this from Bunnings: http://www.bunnings.com.au/handi-home-900mm-2m-plain-frosted-decorative-window-film_p3960052 However, you may want to talk to your builder first as they may be able to replace the glass in the front door for a decent price.

Most door companies stock what you are looking for.

Side lights for sure and a straight door like To find and design pictured but I'd use clear glass, because the door is recessed which creates the privacy. Paint it white and at the same time paint the balustrade white to feature it again as was the idea when it was designed and return the front patio to red which I guess would be the original colour. Changing these great houses from original and think they look better is like getting an original XP falcon and putting a spoiler on the back because a spoiler looks good on a Porsche.

Hi Wren, what a lovely setting! I would be inclined to match the door colour in with the exterior wall colour. Include the casing, threshold and trims as well and this way you will end up with the timber, black and your main paint colour to give a better sense of balance. Good luck! Regards, Kathryn.