xenon sealed beams???

I have a 1989 Gmc SLE with the 4 small sealed beam headlights, Does anyone know where I can find the small sealed beam xenon headlights?
I have the xenon insert bulbs on my 2003 sierra and I love them.

I have a 01 Silverado and installed the Sylvania Xenarc HID set. This is low beam only and Sylvania shipped the Sylvania Silver Star high beam bulbs installed in the setup. They're pretty bright and a few of my friends have installed both the low and high beam Silver Stars and all agree with me that they make a big difference. The Silver Stars are available in the bulb type and sealed beam. I get mine at Advance Auto......... sometimes on sale as a buy one get another at half price.