Onan Green 3885913 is still on back order. Cummins tells us that they are having issues with their paint supplier and that they are unable to tell us when the paint will become available.
What we have done, for our own use, is to have a local supplier formulate our own Onan Green paint and put it in spray cans. It is a high quality paint that is the same type of paint and the color is very close.
Please be aware this is our own workaround and not an official recommendation from Cummins.
If you wish to try this alternative solution, please confirm in the comments during the checkout process or contact us.