Well, live feeders are probably the best thing you can feed your bearded dragon in terms of protein and other nutritional values. However, I do believe there are prepared bearded dragon foods, that come in varieties of pellets, cubes, pieces, etc. You can probably find something at a local pet store. Though those are certainly an acquired taste, and I'd be surprised if your bearded dragon took a liking to them as opposed to live feeders. Additionally, I hear baby food can be used as well for protein, but it's usually a temporary food, mainly for helping bearded dragons in emergency conditions that require them to gain back excessive weight loss or lack of weight.
But I highly recommend live feeders over replacing them with something else. There are a number of alternatives to live feeders; have you ran them all by your grandmother yet? Personally, I prefer to feed worms (see below for more information) rather than crickets, and my family sure prefers that I order worms instead as well. The main issue with crickets is that they are very good at escaping, and can survive for long periods of time when they've escaped. They can also be noisy and smelly as well. Worms can be kept in a small container, out of eyesight, and they could never really escape, considering their very low speed and poor ability to climb. If your grandmother can handle crickets, perhaps she can handle worms? Especially since it's something she'll most likely never see. Other than that, here are a few live feeders you can check out:
- Wide variety of roaches, with the most commonly recommended being of the Blaptica dubia (dubia roaches) species. Another possibility is red racer roaches. I haven't had any experience with roaches myself, but I know many bearded dragon owners consider them some of the best live feeders available. I doubt the thought of roaches inside a house would be a step up, but I figure I'd at least mention them.
- Wide variety of worms, with the most commonly recommended being black soldier fly larvae (typically under the brand names of "Reptiworms" or "Phoenix Worms"), silk worms, superworms (ONLY recommended when the bearded dragon is of a certain age and size, closer to being an adult), and hornworms. I personally recommend black soldier fly larvae, as they are very easy to care for, have proper balances of nutritional values (especially a very good calcium to phosphorous ratio), and are cheaper (for me at least) then buying crickets from pet stores. Unfortunately, most chain pet stores do not carry some of these worms, though it is possible that there may be some out there, and/or you can recommend them to your local pet store to carry as a product.
Other than feeder alternatives, however, your bearded dragon may not be eating the crickets simply because of relocation stress. It's a possibility, considering you've moved recently, I'm assuming. But if your bearded dragon doesn't eat for an extended period of time, these are just some possible alternatives to turn too. Best wishes, and I hope to hear that you find something your bearded dragon will eat!