The UK branch of Huel has a flavor pack sample set for GBP 5.00. But that’s not the actual Huel - just flavor additives - and it’s not available in the North American market.
Which is sad, because some of those European flavor boosters look awesome, and I want to try them.
ETA: Was this what you were looking for? Note it’s on the UK version of the site. https://uk.huel.com/collections/flavour-boosts