Inhibitor switch

My 91 Honda Civic Ex does not get into park. The shift lever is in park but the light on the dash board doesn't turn on saying it's in park and my key doesn’t come out. I usually have to move the shift lever and turn the car off a couple of times. After turning off the card and wiggling the shift lever the light turns on and I am able to turn the key completely off and take the key out. I have done some reading on some forums and I am getting the impression it is my Inhibitor switch or called "Neutral Safty switch", has anyone had this problem before? Is there anywhere online that I can buy one? Honda wants $160 and I can't return it if that's not the problem. Is the Inhibitor switch the same thing as a Neutral Safty switch?