Here's a card from around the SA1 time.It has the less-common 'headphone wearing Sonic' art, with yellow rings to represent soundwaves, and a gray grid background. Sonic's posture was always sort of odd in this art, and where they cut the card off at doesn't really help it out much.
Pajamas These are also available in the UK. The design is not painted on at all, rather it's dyed in there for sleeping comfort. There should be a Sonic on the pants somewhere, but Gear doesn't own this. Sizes are unknown.