De gustibus et coloribus non est disputandum, the old Romans used to say. This is what I got by just using the original lamps and stems. As mentioned before, I have always disliked the amber lights as I associate them with cheap and plastic. Not so much as the PO though; he had even removed the side reflectors and handed them separately in a bag when I bought the bike of him in 1980. On a trip in Indonesia I scored red and white lenses that are for the rest identical. BTW, a friend who liked the result when he saw mine, ordered similar from the States and Taiwan and it didn't even cost him much. I'm a bit old fashioned: lights in the front should be white and look like they are made of glass and those in the rear red. But... I judged that the combination white bulbs and white lenses maybe would not be as safe. Everbody is used to and expects amber indicators nowadays. Moreover next to the white headlamp white indicators maybe would not stand out enough, so I fitted amber bulbs. To say that I was satisfied, mwah... if you looked closely, the front indicators looked a bit like fried eggs sunny side up. I wanted my front indicators to be as neutral and modest as possible. New bulbs arrived on the market and they proved to be the solution. These bulbs appear white or chrome, neutral anyway, but burning they show the amber light everybody expects. Hurray, not only was I safe and streetlegal, but also I had managed to stay as close to the original as possible*. Especially the front has much more class now than before.
* Somebody told me that the CBFours for the Japanese homemarket originally had exactly what I had, but I don't know if this is true.