A List of ALL sailboats made with layouts?
Alpha might actually be Alpa.
We looked at an "Alpha 42(?)" that turned out to be an "Alpa 42(?)". Alpa''s were made in Italy in the 70''s and 80''s. The one we looked at was a Sparkman and Stephens design (I spoke with S&S about it and got specs), center cockpit cruising ketch. It was a ncely designed and built boat with some of those odd Italian design features.
Can''t help with any of the others, sorry!