Could they have put out a tannoy announcement for any of the Dorking fans who had turned up in a home replica shirt to report to the players tunnel, do a swap and, as a momento, the Dorking players sign the shirts? It might have meant the Dorking players needing to wear a t-shirt underneath for hygiene purposes but it would have been a good story for the fans to tell in years to come.
The story does remind me of the time, 20 years or more ago, when Bishop's Stortford turned up to play Sutton (playing in an amber and chocolate kit), with the yellow away kit. Stortford ended up playing in Sutton's away kit and picking up a fine from the league. It's clear the Stortford chairman at the time read the paperwork from Sutton when it was sent through because his excuse after the event was "I didn't know what amber was"!
An earlier posting on this thread mentioned supporters and players being able to pick out players from their own team. I was at Stortford's home match against Alvechurch on Saturday where only two players, both from Alvechurch, played for their respective clubs last season. Most of us spent as much time checking the team sheet to find out who had passed to who as watching the game!