Yes the 32 and 33 commercials are bigger and they different... The 32 housing is more round and not quite as deep... The 33 and 34 commerical housings are a little more cone shaped. There are several companies that sell them. Below are a couple of links to Bob Drake Reproductions the first if for the 32 Commercial lights and the second link is to the 33-34 Commercial head lights... There are several options available for each including turn signals and Halogen lamps.

http://store.bobdrake.com/headlights.html
http://store.bobdrake.com/headlights1.html

Hope this helps...

Dave Brisco