Converting sealed beam to h4 lights?

Hi new to the board! i have a question for you guys i have a 1991 firebird with the sealed beam headlights is therea conversion kit to convert them to the h4 light patteren?

Only ebay seller I recommend buying those from:
http://cgi.ebay.com/ebaymotors/91-97-PONTIAC-FIREBIRD-EURO-DIAMOND-XENON-HEAD-LIGHTS_W0QQcmdZViewItemQQcategoryZ36476QQihZ002QQi temZ120095213394 (http://cgi.ebay.com/ebaymotors/91-97-PONTIAC-FIREBIRD-EURO-DIAMOND-XENON-HEAD-LIGHTS_W0QQcmdZViewItemQQcategoryZ36476QQihZ002QQi temZ120095213394#ebayphotohosting)

That's the exact set I've got, and it's well worth the jacked up shipping price. The seller is really reliable, I've bought from him several times, and he always promptly replies to e-mails.

There are other sellers with the same product, but they all have those stupid little "city lights" in them, like these do:
http://cgi.ebay.com/ebaymotors/HID-DIAMOND-EURO-77-82-91-97-PONTIAC-FIREBIRD-HEADLIGHT_W0QQitemZ310012697923QQcmdZViewItem?hash =item310012697923

awesome thanks!