They are very hard to find. I couldn't tell if you meant T33s in general or just those particular examples.
Don't think this is the car you're looking for:
http://www.seriouswheels.com/Alfa-Ro...f-1024x768.htm
Here's a link to a book on the beautiful cars if you're interested:
http://store.motolit.com/1841553921.html
Hers'a an article on a T33 with a few images:
http://store.motolit.com/1841553921.html
A few smaller photos that don't reveal the cars much:
http://www.racingsportscars.com/phot...-20-photo.html