I wish the club would consider doing what a few rugby league teams do for players testimonials, and produce a batch of special shirts specifically to commemorate the achievement
The shirts are usually a one off design (or we could use one of the old much loved city strips of yesteryear like the 69 black/red final one, 74 blue home one or the play-off final one etc) and has the players name, number and dates they played from/to incorporated into the design (sometimes actually within the fabric weave).
This way fans who can't make the game can still show their appreciation towards the player, and all the proceeds/profits go towards the player (or more usually now to their charity of choice).
Not likely to happen, but i love the idea of seeing one-off special Kompany, Aguero, Silva (etc) shirts done in the classic favourite shirts of the past.