Have you ever considered buying silkworm eggs , hatching them and then raising the worms to feeder size (at least 1.5 inch long) , and letting some go full cycle and become moths .
Each female moth will lay up to 400 eggs which can either be chilled (fridge no colder than 5degC) or hatched right away.
Mulberry leaves are available most everywhere (as far north a 50deg latitude) , and if not available , silkworm chow is available by mailorder and is easy made up in small batches as needed.
From eggs to about 1.5 inch long will take about 3 - 4 weeks (see this thread for how I raise my silkworms from eggs ==
viewtopic.php?f=76&t=222193.)
Another option is either Repashi VeggieBurger and / or Repashi GrubPie which can be made up as a moist paste and used to provide a good balanced diet for a beardie. Can even use a mixture of the two to give any portion veg : insect protein you like.
I know of a few people who have very restricted live insect access (from commercial insect breeders) or no live feeder insect access because the price per insect is prohibitive (ie over $1NZ per cricket !!) who have successfully reared beardie hatchlings on GrubPie and are still using these products with not health issues.
If he is starting to waste , it may be indication of a serious underlying health issue , is definitely worth having a good reptile vet examine him and check for issues with his kidneys, heart, liver and for hidden cancers in the body cavity (might be able to detect these through xrays and blood tests).
If they detect no major issues , you've spent a little money on a vet consult and tests , and will likely have a much better idea of what ails him .... if anything.
