Here is what I had to do since they don't sell the replacement switch anymore.
I wend to local HomeDepot but couldn't find one to replace with.
I decided to check out automotive parts and went to Advance Auto Parts.
After looking around half an hour, I found Auto Craft rocker switch(25 AMP, part #84835, $6.49).
It has three connectors but used only two('supply volt' and 'on acc').
It was close enough for me to cut the edge to fitted through. Top part is made of plastic and was easy to cut with the utility knife.
Take your time and don't cut yourself!!!!!
After 20 min I was able to force it through and put little glue on the top edge to hold.
They only had two color blue and red. I pick up blue and it looks little bit odd but it is working. My next step is to make it black and more permanent.
(this is my first post and hopefully posted to right place; previous was posted in the wrong place)