If you reach Port Antonio Stony Hill Road pass the small river and come all the way up until you see a watertank and signs about waterprojekt on your right side also a shop. Desi Shop. Go there. If you park by the shop, pass the Shop and come the way down.....you will see it by your left side.
I finally called in despair and she told us to look for the car wash. Many more trips up and down the road until we noticed men washing cars in a creek that ran along the side of the road. We forded the creek and finally found our way. We were thankful for the 4WD car we'd rented - the road through the mountains was crazy.