Wheel Sets, castors

i kindly ask you about help for finding producer of wheel sets used for internal transport equipment. i"m locking for products includes the following types of wheels:
metal-and-rubber,
plastic, plastic-and-rubber,
aluminium,
aluminium-and-rubber,
plastic (polyamide or polyamide + polyurethane),
cast iron,
pneumatic wheels,
gate rollers,
rollers for pallet trucks,
wheels for mowers,
furniture wheels.
thank you in advance for your help