Bob,
All good news! I suspect it's too early to talk price point, but I'm hoping your price will be competitive with the NJ International LED PRR PLs. Yours, however, will undoubtably look better. Did you say that yours would have the lower aspect as well?
I've been using IR sensors for mine, but some sort of signal logic that does a combination of block occupancy and route indication would be ideal if they came with functioning lower aspects.