The part number is TD350-75360 Switch, Work Light.
The installation was surprisingly easy. In the upper part of the dash where the shelf is, there is a phillips head screw that needs to be removed. On the bottom of both sides of the black dash panel are (I believe) 15mm bolts. You can loosen them after you remove the screw and the dash panel can be lifted up and away from the instruments. You don't need to take it off, you just need to be able to reach inside of the dash. After that's out of the way look on top of the wiring harness in the upper part of the dash, for a piece of blue tape. Cut and remove the tape, and that is the plug and wire that goes in the back of the switch. It's easiest to feed the wire through the hole, plug it in to the switch, push the switch into the hole, and then you can reassemble the dash.
If you think about it first, you can just guide the dash panel onto the loose bolts, then tighten them up, replace the screw and you're done. Or you can do what I did, replace the screw in the top, guide the dash to the bolts, realize the dash won't deflect enough to slip over the bolts, then remove the bolts, and reinstall them. :banghead: The whole procedure didn't take as long to do it, as it just took me to describe it.
Good luck,
Joe
PS. The screw and the bolts are not easily visible, you have to look hard to find them, well at least I did.
BTW, I got the switch from Coleman Equipment, total cost $55.64 incl shipping. They will have to order it, so it will take about a week to show up, but they had the best price and I already had an account with them.