acknowledging this is a Zombie thread (but then again even a Zombie has to earn a living, right?) I once did a homebrew restoration on a Bob Jackson-made Merlin and could.t find the correct decals (I never thought to ask Ed Litton, but...) so I drew the vector artwork and had adhesive vinyl stickers printed by the then-still-alive Velocals.
I might still have a few extras that I didn't use, no idea if the material would be 'good as new' or even just usable, but JR (Velocals' sole proprietor) generally used good materials and durable inks.
So if anybody is looking to do the same, PM me and I'll take a look thru my archives...but that won't be quick.

Let's see if I can find a visual ref


my decals placed on the BJ Merlin

the 531 was supplied by somebody else (maybe Lloyds?)


Huh! I sure picked some weird stuff for this build, but then it was destined to be flipped so I just picked thru my bins.

I had no idea there ever was any Merlin built by Raleigh but that red example has the Carlton-only "Capella" lugs...so there ya go!
I doubt BJ would have been able to acquire those lugs, if he had wanted them, but what do I know?