I have ordered products from here with great success: http://bedwettingstore.com/
I was 10 when I finally stopped wetting the bed. I can tell you it was beyond mortifying even though my parents were cool about it and didn't blame me. (I'm 44 now, lol.)
We tried the usual: no water after dinner, kegel exercises (recommended by the doc -- start & stop when peeing), mom waking me up and walking me to the bathroom. I still woke up in pee almost every day.
Then they got a machine that made a loud noise when I wet the bed. (They're much better now. This one was HUGE, lol.) It started waking my parents (not me), then it would wake me as they came in, then I started waking after it went off, then I would wake as I was peeing and finally I stopped.
But remember, I was 10. It just takes longer for some to mature enough.
I haven't even TRIED to make my sons (6 & 4) sleep without a diaper. Regular diaper. They let me know the nights they want to try, and we have plastic sheets so they can. It will happen when it happens.
BTW, if you want, the contemporary machines like the one I had are available at the URL I mention above. And it did work for me, so many years ago, so I recommend it. I don't know if it will work at 5, but if it doesn't, you'll still have it for later, right?
So much good luck to you.