This is probably known about and you're all wearing them already - I'm wearing a light cycle (original version) t-shirt at the moment - but play.com have a bunch of FLYNN t-shirts that are going to be released on 7th March:
FLYNN'S ARCADE (yellow on black)
FLYNN'S (red on black)
FLYNN'S ARCADE (red flynn, foil arcade, on black)
FLYNN LIVES (white on black)
FLYNN'S (yellow/red on black)
FLYNN'S (yellow/red on blue)
more Tron t-shirts