we replaced our inside ones and bought ours from M4products.com
They are set up for RV market, and have very helpful videos on their website - you can also call them for help.
More expensive than direct from China on ebay, but I was told exactly what to order and everything fit perfectly - we had 1 that didn't work out of the box which they replaced immediately and we returned the ones we didn't need (ordered 2 different types for the same fixture, picked the ones we liked and returned the rest) and got a very quick credit.
2015 Georgetown 351DS
Chris, Garren (humans)
Edgar & Carlos (felines)
RIP Sophie, the sweetest cat ever.