Actually I will profess that it's possible that Merlin changed their logo at some point in later 90s or so to the separated letters. My 2003 has newer logo. I'd guess you could be sure by looking and comparing to the head tube badge.
I do know that the only aftermarket decals I can find are the joined letters version (velocals I think is one company. Today's Merlins (competitive cyclist) have the separated letters. I actually sent them an email to ask if they sell the frame decals but haven't heard back.