theres a guy that advertise on ebay......... i think your looking at well over £100 for a propper airbrush jobby, although i guess it all depends on what you want, i know peeps that heve DIY painted there lids, you say the design is simple, so maybe an option?.......... or get some stickers made? or even that heat shrink wrap stuff?
heres the link
http://cgi.ebay.co.uk/custom-paint-a...d=p3286.c0.m14