Quote from a mate at work that has one. He is very up to speed with the pirelli, done lot of little tweeks like steering wheel stitched in yellow etc, so he knows his stuff:
"Pirelli boot badge not available now apparently, Would need to be made by custom badge supplier"
"I got 4 new wheel centres from dealers last year, approx. £16 each"
He suggested that your friend could have his Pirelli badge re-worked if he has one.