Hydrangea, Mountain Hydrangea 'Crug So Cool'

I saw this particular hydrangea serrate "crug so cool" on a gardening show in the UK (Gardner's World/ Season 52-Episode 18-Carol @
...Read More> the Hydrangea Garden in Darley Park, UK). It sounds very unique in that it's a small shrub with small-ish, not typical hydrangea flowers but rather small-ish flowers that change from dark blue to lilac, to pink and then blue again without adding anything to the soil. There is no info on this site about this cultivar. It appears to be sold and grown in the UK, and France so I was wondering if anyone has grown this particular hydrangea here in the US or knows of a source in the US. Thank you in advance.