Hello. I'm replacing a garage door. the replacement door is about 4 and a half inches deep, 31 and a half inches wide, and 81 and a half inches tall (If I recall correctly). In front of the door i had a wood casing that not only covered the spot where the door jamb and rough framing met but it also stuck about a half inch into the gap between the framing and the stucco. In other words, the casing is L shaped if you view if from the end. Can anyone suggest where I can buy some new similar exterior wood casing? Or is my best bet to buy two pieces of wood, one to give support to the end of the stucco and also be wide enough to be flush with the new door sill, and then a second piece to be flush with the first piece and also protrude out from the outside plane of my stucco? thank you.