Kate, here's some additional information on the units involved in the Ploesti raids;
"Two B-24 units, the 98th and 376th Bombardment Groups were already present in North Africa. Two more were detached from the Eighth Air Force in England (the 44th and 93rd) while a fifth unit, the newly formed 389th Bombardment Group was diverted from the Eighth almost immediately after arriving in England. Together the last three units formed the 201st (Provisional Wing) and began to practice low level flying over Norfolk."
"Halfway to the initial point where the final turn was to be made into Ploesti, the 376th Group, followed by the 93rd Bombardment Group, made an erroneous turn southeast toward Bucharest. The other bomb groups, the 389th, 98th, and 44th, continued as briefed. When Ent discovered the error, both groups headed back toward Ploesti. The 376th was told to strike targets of opportunity, and the 93rd attacked the original targets from the opposite direction as briefed."
On the search results page that I had is the following information:
Reunion to reunite surviving Ploesti raiders | shreveporttimes.com ... Feb 5, 2011 ... "World War II Ploesti raiders from all units are welcome, regardless of their level of ... best known for its part in the most famous Ploesti raid. ... Consolidated B-24s fly just over treetop level on their way to bomb ...
shreveporttimes.com/article/20110205/... - Cached - Similar
The link to this item said could not be found but it was talking about a reunion of survivors of the raid and the article in the Shreveport Times, February 5, 2011. It may be worth contacting them for a copy of the article which may have unit contact information.
Additionally, here are links to the bomb groups involved. Some of their sits have some detailed information, history and research information.