Industrial Uniforms Suppliers,Wholesale Industrial Uniforms,Industrial Uniforms Supplying Companies
Above is the link i got from Google for the uniform vendors.
Also i would suggest that you may purchase cloth from a reputed vendor like raymonds or Bombau dying and have them stitched locally from a reliable tailor by taking measurements or you can pick from the below tailors in the link.
<link no longer exists - removed>
23rd August 2014 From India, Mumbai