Very noisy operation

Question

Dear Sir,
My Technika D3/900 ragnehood is very noisy. Took down to inspect. Found several fan blades of the centrifugal fan's rotating drum broken. Will this caused the motor to rotate noisily when used at highest fan speed? Where do I get spares or a fan motor drawing to identify the part so I can quote the spare part number to the appliance parts distributor.
Please help.
Al