Whereabouts can I get my exhaust cans repacked?

Not doing well with my MOT on my CBR coming up. Cans are farting like crazy.

Can anyone who’s had good experiences recommend somewhere in London that repacks or tunes them?

Thanks.

powerpuffgirl’s other half does exhaust work but he’s up in stevenage…having said that living with Gabs he knows his way around an exhaust:P

M and P used to do a repack kit …maybe worth a look