Hello Lloyd and Michelle, and welcome to the forum
Marmites here in the UK seem to be somewhat few and far between, and I have never seen one for sale here in the UK (only in France, I think). If anyone knows of a source though, I would be most interested, too.
Which Blanket Set are you looking for? The "Large" one (for 24 OD Blankets) or the "Small" version (which holds 8 OD Blankets).
Thanks, and welcome to the community again,