Yeah that's why I made the switch from crickets and even started a dubia colony of my own.
But not all hope is lost!
There are worms you can give your beardie: Silkworms, butterworms, Black Soldier Fly Larve(aka Phoenix Worms/Reptiworms/Calciworms,) and hornworms
And superworms for dragons longer than 16 inches
Yes they can replace your crickets as a staple, specifically the Black Soldier Fly larve or butterworm. When properly dusted and stuff they are very nutritious and a good alternative to crickets or dubias. You shouldn't feed any one type of worm forever; you should offer a variety of foods to your beardie including fresh greens and veggies
Waxworms are higher in fat and should be fed as like a treat every so often
You have to remember that all of these feeders can be VERY expensive for Canadians. Even if you buy online, shipping out east is very expensive. If you can start a colony up of horns, silks or butters(hard but not impossible, just tedious) that would be your best bet.