Hello!! I had a similar problem with my male, who chewed the bars of a metal crate as well. I ended up using one of the plastic airline crates for him- they're cheaper, lighter, more durable, more "escape-proof", and darker inside so they tend to be a little more den-like.
Also, check out Crate Games- there's the DVD on Amazon but you can also find many videos on youtube. It really helps with crate training as well as learning impulse control, etc.