Haha, I did this "mod" a few weeks ago. Basically bought a FL set of controls with the silver surrounds on the dials, then put the PRE-FL board into FL plastics.
You end up with an FL board in PRE-FL plastics left over, so only useful to someone with FL model who isn't bothered about having the correct plastic.
I threw mine in my box of bits I've hoarded from mods like this lol.
Sorry for side tracking. GLWTS