We had a similar problem at Wembley for the Foo Fighters gig. They had these limited edition shirts made up but they sold out on the Friday. I emailed Wembley and they gave me the name of the company who run the merchandising stalls outside.

Give Twickenham a call and maybe they can do the same. The company I'm aware of is called Firebrand Live..but I don't think they did the merchandise for Bon Jovi last week.

Or wait for BJ.com as suggested previously.

Good Luck!