Grey tile grout - specific (Broadwater SG2)

Hello all,

A bit of a long-shot, but I've juuust run out of this stuff. You cannot buy it in bags less than 5kg!

I am wondering, and hoping someone might have a small amount left over from a tiling job?

I, specifically, need the Anti-Mould Flexible stuff to match what I've been using, please.

Many thanks!