There is no "cheap" solenoids that will handle that kind of amperage--they are going to run about 50 bucks or more for a good continuous duty one like a Cole-Hersee or similar brand.A ford one is bakelite plastic,they will melt if left on more than a few minites.I use ford ones in my winch remote control on my trucks small crane--it takes 4 of them to make power in and out work.Two of them are partially melted,the posts for the battery cables are kinda sagging on them(they must be the 2 that energize the "Lift" side of the curcuit that has all the strain)--I have them mounted in a metal box under the bed,so the whole truck wont burn up when they fail completely. Grainger has them,but not cheap--a good place to try would be a parts house for semi-trucks,they usually have or can get Cole-Hersee or similar brands.Its not hard to find a solenoid that can handle the amps,its the continuous duty part that gets expensive,most solenoids dont like being engaged for more than a few minites or they get hot. /forums/images/graemlins/crazy.gif