I found this one on ebay , I'm not sure if this a good choice or not , so I'm asking the group . is their a better place to buy ? http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270716798348&category=164974&_trksid=p5197.c0.m619 yes I know I can use a 3055 and a 1 watt zener Thanks Ed