Machinery pneumatic chucks buy inquiry from Russia

May be you can help us to find the following chucks in China or Taiwan.
We need the best price for 3 pcs. of 3-jaw (or 4-jaw) power-operated pneumatic chuck (or with driving gear).
Diameter 1000 mm, inner bore(hole) not less than 500 mm.
Fixing is on screws or double-end bolt.
Thank you in advance.
Kind regards,