There's the anomaly of D76 sold in the UK in 3.8 litre packaging (1 US Gallon) and it's Replenisher in 5 litre packaging. D76 & Dektol (powder) are the only Kodak chemicals not sold in fully metric packaging. But neither are particularly big sellers in the UK where Ilford ID-11 etc are far more common.
Across Europe & South America you're far more likely to find Ilford B&W films, papers & chemicals. Since dropping their B&W papers Kodak have lost much of their share of the B&W processing market.