Klenk's is manufactured by ICI (Glidden). Off the top of my head I don't remember which division. It was Zynolite - I think it is Macco now. Call - 1 440 826 5160 - that is Macco customer service - they should be able to help you.
I would doubt Avacado is made anymore, and I do know there are no spray cans available in any colour.