These rumors began to surface more than a month ago and they are swirling again. No official announcement has been made, but according to an unidentified source Tesla Motors (TSLA) and Toyota (TM) have signed an agreement to begin developing an electric version of both the RAV4 and Lexus RX SUV’s to go on sale sometime in 2012. It’s believed the two companies have been working on this for some time and that Tesla has produced a prototype to be delivered soon. On June 10th, Tesla revealed it would deliver two prototypes by the end of this month, but didn’t specify the models. We can only assume it’s the RAV4 and Lexus.