Formula305

I'm not sure if it was 91,92 or both that got the new teardrops in the front nose and whether it was Formula's, t/a,s or both.
Which ones have it ?
Secondly how many Formula's are out there with this nose without t-tops ? Are they hard to get ? Are they in good condition - I know they are 10 years old but there must be some ok ones that are not modded or am I hoping for too much. What $'s are involved ?
Thanks.