Do they have team mascots? (ie. Macclesfield Town has Rory the Lion, so you could make a lion). If their team doesn't you could invent one for them in the team colours.
How about little round AstroTurf beer mats, or placemats - you could paint white lines onto felt. If they get bored when eating they can even play with their food. Ha ha - sorry!
Team rear view mirror hangy thing with the club logo - you could make out of felt and embroider it, or just print onto paper, laminate, hole punch the top and string up for a quick car accessory.
Hope these help or inspire more ideas for you! Ph x