You don't need a Mazda specialist... it's hardly an F40, just take it to any garage.
Hardly going to impact upon th reesale value of said Mazda 3!
I know its not an F40 but I'd rather go to someone who has done cambelt replacement on mazda before
I did check and unfortunately 2.0 Diesel MZR-CD has cambelt
Thanks for suggestions will give them a ring