Is There a Way to Farm Ultra Rarity Gobble Gums?

Seen a few people mention ways to farm gobble gums but won't show or tell the methods they use.

I'm trying to farm the ultra rarity gums ready for season 2 lauch of the tomb map, but when searching for a gum farm method people talk about how they are farming them but won't say how to do so.

Have any recommendations on how to gain gobble gums easier, even if they are not ultra gums?