Hi John,
Here are a couple numbers we have used to paint our stuff. I personally think it is close.
RED - PPG omni-AE MAE Acrylic Enamel brand code 71973
YELLOW - PPG pmni-AE MAE Acrylic Enamel brand code 3274
Quality paint and it seems to hold up under the sun!! Of course we use hardener and reducers as well.
Hope this helps a little. I do have some NOS MH paint but I have resisted the temptation of opening it with no promise it is even good!! It is old enough that there are no paint numbers on it anywhere.
Gary