A lot of people bowl feed in situations like this. Anything from a very shallow desert style bowl to a ramekin works fine. It's kind of surprising how deep of a bowl toads will eat out of. They also learn pretty quickly to check the bowl for food, so no worries on him finding it. The only word of caution I'd give is sometimes toads can get... overzealous while hunting and end up flinging a bug across the cage. Not a big deal, but something to be mindful of. You can bowl feed crickets as well if you break/remove their hind legs.

And, for the record, if you don't force it, the shyness should pass. It took a couple months to get the trust built up with my toad, but now she perks up when I stick my hand in the cage and hops over looking for a roach. It just takes time.