buy L-Vitamin C

We are an e-commerce business whom intend to supply bulk vitamins worldwide outsourcing supply and packaging. Primarily we are based in UK. We need reliable competent supplier's whom can supply high quality vitamins and whom can package our order into smaller 1kg parcels and maybe mix vitamins together to package into 1kg parcels.

Please could you inform me if you can supplt vitamin c is l-ascorbic not d-ascorbic and if you supply vitamin d3 powder?

Also can you package in 1kg bags min 25kg?

And price to UK 25KG-100KG-500KG-1TON?