Aluminium Roofing System materials needed in Tanzania

Aluminium roofing shall be colour coated industrial aluminium roof sheeting (Hula span A7) manufactured by Hullet of Republic of South Africa (RSA)
or other approved manufacturer, and shall conform to the requirements of BS 3428 type 'A'.
The gauge and the surface finish of the sheets shall be as recommended by the manufacturer, in writing, and approved by the Architect.
All accessories shall be of aluminium alloy.
we are looking for this material.