I am in the same boat here. Looking for some amber sealed beams. But now I think I am going to get a can of metal cast. then if it sucks pay the bucks for the real deal. Eric
Taillight king lists them but has none in stock. I'm looking for two myself. http://www.taillightking.com/fog_Driving_light-Bulbs.htm 4433A is the correct part number. Looks just like a common 2D1 headlight except it's amber. The 4415a listed on ebay have two screw terminals on the back, and doesn't have the 3 locating lugs on them to position them in a 2D1 housing.
I know this is an old post, but I'm new here & here goes just in case someone needs it.... The part # 4433A 7" amber lights are no longer made, but can still be found. I just bought the last 4 at www.replacementlightbulbs.com. but they still get them in stock once in a while, so keep checking them out! There is also one 4433A on eBay right now, but you can bet it won't be there for long!
These guys might be able to help: http://www.davisbus.com/accessory parts manual 2006/02Lights_02.pdf
I found some 5.5" amber sealed beams on Amazon.com for half the price of anywhere else. Maybe they have the size your looking for--
Hi I have a fair number of these 4433A - brand new. Yes I signed up just to tell you. They're excess stock from a local school bus builder. Let me know if you're still interested. I'm located in the Dayton Ohio area.