Capt. Mark
On the issue of your "Anchor Light" my old "74 Hiliner Gypsy has the same light in the same locale. But from what you describe, its seems your boat may have had the wrong light installed since you Dad's days.
My boat has a light that looks similar to a regular anchor light, but what it really is, is a "Masthead/Anchor Light"
It has (2) separate bulbs in one globe. When you are underway, your red and green side lights are on and only the "Mast Head (forward facing) portion of the light is illuminated, (its not shining in your face), when you switch to the anchor light, your red/green lights extinguish, and the Masthead portion remains on AND the rear (anchor) portion of the light is illuminated is illuminated. (this will shine in your face)
On boats like ours, the transom light is our stern light when underway. This light also extinguishes when the red/green lights go off. I use a Cole-Hersee 2 position switch for this. 1 click out - Nav Lights, 2 clicks out - Anchor Light.
I've been trying to find a new Masthead/Anchor light like the one you need for years, but like you, I can only find the Anchor light alone with that mounting configuration. Perko may make one, but you'll have to check out there master catalog on their website.
If I find one, I'll let you know where I got it