1122-350-0826 is a current part number that shows 066 compatibility with the most recent previous part number being 1122-350-0817.
That said, 1122-350-0827 is also a current part number that shows 066 compatibility, but does also list the 064 and MS640. Previous part numbers there include 1122-350-0800, 0801, 0809, and 0816.
I'd guess the latter (0827) would be what you're looking for just from the 064 reference alone, though don't know exactly what the differences would be from the 0817 / 0826 tanks. Could be as simple as the tank vent or something more involved like the intake bulkhead arrangement. If you're lucky you can still make out the part number of your tank for cross reference and go from there.