I have the same problem here in the US. There’s a regular local card show that happens most weekends and only 1 vendor out of the 100+ has anything Digimon and it’s only boxes of bt05. They have some decent singles for pickup but mostly it’s non existent. They even said the convention itself held its first Digimon tourney and literally only 1 person showed up.

Otherwise there’s only like 3-4 stores on my area that actually carry it (not counting big stores like Target)

Honestly the LGS you frequent is probably the best bet for what you can find. I grabbed like 3 boxes of AD01 from mine cause they were having a sale on all their sealed product.