Soundproofing M2 Comp

Hello folks,

Can anyone recommend a car soundproofing shop in SW London or Surrey?

Love my M2 Comp but the tyre roar on motorways literally gives me a headache and triggers tinnitus (many years riding loud bikes with no ear plugs - silly me...). Have a Euro tour coming up this summer so keen to see what can be done. Presume stuffing some sleeping bags in the boot won't be sufficient