Need source to replace FIC lock cylinders for RV door

Here is a kicker for you. Fastec will be happy to sell you cylinders. The key that is used to retract the clip that allows you to pull the cylinder out, they won't sell to you, period. If you want to replace the cylinders out yourself.

Same with Global Link. The cylinders they ship are worthless unless you can pull the old ones out.

The trick is to hit ebay and buy a blue or yellow key from one of the people there, that or just buy new handles keyed alike.