I FINALLY found the memo from the Dealer-Service info sheet 28-DATED 11/14/96
Other than the original part numbers from scag-at $20 a can
P/N 48008 OR P/N 48521
PRIOR TO 1989 USE 48008, LIGHTER IN COLOR
1989 AND AFTER, USE 48521-DARKER AND A STRONGER POWDER PAINT
"In order to paint large areas of a Scag machine you can purchase the paint in large quantities from Sherwin Williams commercial paint stores. To find a store near that sells the paint call sherwin williams at 330-376-2126. The SW part number for the paint is F75XE04101-4312"