The 49A Special Coupe and 45A Standard Coupe production numbers were combined in the Ford records so no one has been able to get an exact number.
MAFCAs Coupe Book has a couple mentions on the totals - that vary.
One article says "Using L. Henry's data, the author (Roy Reger) estimates that 92,010 Special Coupes may have been built in 1929." Another article cites Roy Reger's article and adjusts it for monthly engine production quantities and estimates that 53,000 were built in 1928 and 108,560 in 1929 for a total of 161,560 or 62.5% of all the Standard/Special Coupes were 49A.