leather was standard on GT, guessing you got to choice the colour if you bought it originally.
rays range from as low as £300 up to about £600 depends on if they have tyres, what the tyres are like , and the condition of the original rays.
shame really as i beleive the rays were a £2000 option, or at least thats how much it apparently costs the dealer to order new ones if you get them fixed under warranty.