I've designed and offering these portable center armrests for out 150-152's from 1966 forward (electric flaps) Works great, reduce fatigue, can be used by either pilot or co-pilot, makes throttle operation alot more comfortable, price is $50 which includes shipping and handling to anywhere in the continental USA. PM me if you are interested or email me! Would make a great Gift for the 150/152 driver! Pictures can be seen on the following link.
http://www.barnstormers.com/cat.php?mode=search