Depends on how involved the design is and how many people are interested.
What year/model merc do you need new decals for?
I would be interested in a set of 115 Bluebands. my serial number indicates a 1980 aussie built, just before the factory shut down, but my current sticker set, which is original and heavily faded, indicate 1983 - I can confirm closer to the realisation of this happening. I just cant seem to find the "thunderbolt ignition" decal on mine, which indicates 1983.... I think.....