too bad you didn't post about those bulbs here first.

it's very easy to make your own.

you just get the stock amber bulbs and go buy the highest temperature rated silver paint.
next you tape off the metal part of the bulb then give a really light quick coat of silver paint

wait until it drys and put in your car. the good thing about this method is that #1 it works, #2 if you screw up on a bulb you didn't spend $20 on them.

check to see if the silver part of the bulb is in contact with the metal base. if it is try scraping or rubbing some of the paint off so it's not touching the base.

also I've never seen silvervisions for japanese cars. only european cars so it might be the wrong bulb type? :dunno: