Ditto on M4Products.com. They are great to work with, and if you mess up, exchanges are quick. Their website has good descriptions of the lights. IQuality is top notch, so you won't be replacing defective LED lights. I changed out all my lights on our 2008 Journey this last month after upgrading to solar & lithium batteries for the house. I used the Winnebago electrical charts downloaded from Winnebago website to determine the correct bulb types, but you can also match the bulbs using pictures on M4. Also swapped out all the exterior porch, docking and marker lights.
Replaced a couple of fixture with M4 products too.
J&C
rvbuiltfortwo.com