I've always had them made from home and I love them (so much so that I ate way too many when I was pregnant... so warning... a handful of chips equals more than a full banana... therefore a whole container equals way too many bananas!)
All you need is a bunch of bananas (ripe) and some lemons or lemon juice.
If you don't have a dehydrator you can still dry fruit. All you need is an oven, cookie sheets and parchment paper. Set your temperature and let the oven do the work.
And here is the final product! Yummy and fresh and healthy.