Those Genoa sizes are all percentages of the fore-triangle. 100% or 110% is the working jib size. (The "J" measurement - mast to tack - is nine feet 6 inches) The manual shows only maximum measurements:

Working jib (110%): Luff= 28' 6", Foot= 10' 4" and Leach= 25' 0"

155% Genoa: LP= 14.725', J= 9.5'

One of the "pre-owned" sail lofts should be able to use those numbers to find something that would fit.