Suggestions for matching 1x12 t&g panels from 1940
I'm trying to find a good match for some 1x12 t&g panels that are used in my home. The pattern is very close to the WWPA WP-3 standard, but doesn't appear to match exactly when I measure. My panel seems to have a smaller pattern, and also the length of the board appears to be 11 1/2 and not 11 1/8----besides I can't find anyone who stocks this WP-3 pattern any ways.
So I'm looking for suggestions on replicating this pattern? Should I just buy regular 1x12 t&v v-groove and try to route the pattern myself, or is this just best to go to a local millwork. I have very littler experience with a router, but I am also very motivated. Can anyone recommend a lumber dealer or millwork in the Sacramento CA area. See attached image which includes the wp-3 pattern and a side profile of my panel I'm trying to match. Again, the measurements on my panel seem to be smaller.