Just recently found another few Merckx sponsored teams. First up is Marc-V.R.D., starting in 1980! Might have been the first Merckx sponsored team.
Their frames looked somewhat similiar to the above. Marc teams continued to use Merckx frames for a couple of years, but I haven't found any decent pictures to indicate what they looked like.
In 1985, Tönnisteiner roade Merckx frames. Here's a black and white picture of Filip Cottenies. In this picture, you can just make out someone (might be Cottenies, I'm not sure) on a white frame with a red head tube and read seat tube panel.