I have got a digital copy of Busmann's book. Living in Germany, I was able to borrow it from an university library. Hendrik Busmann is an art historian, and the study on the Sovereign of the Seas was his doctoral thesis. Accordingly, this is serious academic stuff with plenty of footnotes. The book is lavishly illustrated, which explains the rather prohibitive prices for which it is on sale. While Busmann gives an overview over the building of the ship and its service history, its mostly devoted to an analysis of the iconographic programme that lies behind its many sculptures. Busmann analyses the over thousand carvings from the figurehead to the taffrail in the wider context of art history. For this reason I think that you might find answers to some of your questions in it.
Perhaps you can write me an email for further discussions.
