of course! There are PLENTY of other choices. Terrestrial isopods, various beetles, termites, grasshoppers, crickets, indian walking sticks, moths, silkworms, butterworms, snails, blue bottle flies, etc.
I have never fed cockroaches but have been able to increase the variety of insects for my adult Panthers by breeding several species of stick insect.Very useful during winter months where no wild insects can be found and things get a bit grim with just crickets to feed.Currently breed Macleay's,giant spiny,Indian,Ramulus and others.All do well on raspberry leaves or salal in winter when it gets too hard to get any other leaves. All complete a life cycle in 1 year or less so you can get a continous population going of breeders and juvenilles for chameleon food.My chameleons readily take any of these species and make good additions to an otherwise boring[and nutritionally incomplete] diet