求購玻璃沙

以下是一位國外客戶(hù)的詢(xún)盤(pán),要求采購沙子用來(lái)生產(chǎn)玻璃,請廠(chǎng)家與我直接聯(lián)系,該詢(xún)盤(pán)好急!

Please help to find supply sources for silicate sand used to make window glass, glass tubes and mirror.
The material is called Silica sand Medium B (50/80) and its specifications are:
Size                                Cumulative Retained by sieving

bigger  than 800 micron        0 %
bigger  than 400 micron        less than 10%
bigger  than 355 micron        less than  30%
bigger than  315 micron        between 20% and 50%.
bigger  than 200 micron        between 50% and 95%
bigger  than 100 micron        more than 80%.
The color is white.
We want to buy a large quantity per month and its packing is in 20-25kg bags, if possible.
We can also buy in bulk vessel.
Do you need a permit to export this silicate sand for factory use?? ( not for land reclamation ).
Please find out the price FOB or CFR basis.