1992 Toyota Camry Air Idle Control (AIC) Motor

Engine problem
1992 Toyota Camry Wheel Drive Type unknown Automatic 85000 miles

I just bought this used 2.2 Toy Cam. DO NOT know mechanical so am getting info from my mechanic. THe first month I owned this car, I did not have this problem. Within 6 weeks the following stalling problem started: When first started, it runs great. Within minutes, it starts stalling out to the point of being VERY dangerous. :Cry: When I come to a light, I must leave, at least, 2 car spaces between me and the car in front. This way, as the engine starts to power down (as in "stall") I can ease up on break, and give a little gas, thereby forstalling (pun intended) the stall. PLEASE advise where I might purchase, or find more sources, other than eBay, to locate a good used AIC motor control. Is this the only reason I am experiencing this horrible, often scary, situation? Also, is this a common problem? Thank you, for more reasons than you will ever know, how much I appreciate any help you can give.?