Harlequins Cancer Research Shirt Does Anyone Know Where I Could Buy A Harlequins Cancer Research UK Shirt (Pink) Or Swap My XL For An L?

Does anyone know where I could buy a Harlequins Cancer Research UK Shirt (Pink) or swap my XL for an L? - harlequins cancer research shirt

I bought a pink shirt Harlequins Cancer Research UK last year in the game Harlequins v Leicester at Twickenham last year. I bought a very large, but now I am fat. Does anybody know where I could buy one to replace my large or XL for a L?
Salud!