Hi Beach Property, welcome to the site. You didn't mention what year your boat is, or the general region where you're located.
Cabin Door: Take a look at the Maxum Contact info thread:
You very well may be able to purchase a replacement directly from the manufacturer. You will have to go through a Bayliner/Searay dealer to order the parts. Thne site also links dealers as well.
As for the Windlass and remote spot, there are many folks who'v added these parts on. Try the SEARCH feature on the site to find a list of posts related to these topics. Other's who've installed these items may chime in with more info.