Hey, where has everybody been ?
Anyway, here is my guesstimate on this deal.
Kustom made about 8,760 K200A amplifiers July 1967 to April 1968 (approx SN 15040 to 23800).
April 1968 to June 1968 was the A to B series transition period when Kustom produced both K200A and K200B, making about 2,000 amplifiers (approx SN 23800 to 25800).
So if you take the approx 9,760 K200A amplifiers and put in Pleat's percentages (55% PA, 25% bass, 20% guitar),
you get 5,368 K200A-5's, 2,440 K200A-1's, and 1,952 guitar amps.
If you take the 1,952 K200A guitar amplifiers and put in percentages that I just made up (55% K200A-2, 10% K200A-3, 35% K200A-4),
you get 964 K200A-2's, 175 K200A-3's, and 613 K200A4's.