I'm looking for a spare motor for my Simpson Lawrence Horizon Express windlass. Before leaving the boat in Antigua and heading to the States, I copied down the part number from the manual as 60533112. Searching the internet for that part seems to bring up 60533212 (pyacht.com, go2marine.com). Maybe I copied the number wrong (too much time in the sun? too much rum?). Anyone have any thoughts on this?