Windolene Cream, where to locate stock?

I've been everywhere,

Asda, Sainsburys, Morrisons, Tescos, Semi Chem, Superdrug, Poundland, Poundstetchers, Savers and for the life of me can't find Windolene Cream only the spray.

Where do you purchase yours on the high street?

Needing to black out the windows on my new home.