Hi, not sure if this is the right plase to put this .My family,and I own a resturaunt.We have a 3 door traulsen freezer.the problem Im having is the defrost timer ,model 8141-00.The points are shot on it .I filed them down,and did get it working again ,but Im going to have to replace the timer.My question is can I use a differant model or do I need the same one.I found one At graingers for $176,but it is a 8141-20,also theres one on ebay,a 8102-3 ,looks the same as the one I have.Thanks for the help

scott