Hood Pin Types

You could try a Mercury Type switch ?

http://www.gizmocity.com/autoaccessories.asp

Mercury switches are great but if you park on hills don't use them unless you always park on Flat gound. I love them myself, great for hood and trunk If your car gets towed or jacked up for somene to still your Rims and Tires. Just remember with all the good reasons to have something there is always one or two not to. There is a way to add them to your car even with hills. But cost lots of money and some creative wiring. I can not afford to patent my idea so I will just have to keep them on my cars for now. I have 3 under my hood and a few relays that is all I can say.

So if you don't park on flat ground always use another type like Flange Mount Pinswitch  that way the switch is not installed in an area that water will flow and freeze up. hope that helps and if you want to know what that looks like take a look at http://www.harrison-hellfire.com/install.html about half way down they even have one that is rubber booted. I use these and they work great for other peoples cars. and have used them on my own in the past.  Good Luck.