Eenee: http://www.eenee.com/contents/en-us/d56_eenee_swimmers.html
Look like normal swimmers, strings to tighten to ensure contain-ability and often preferred by schools. My only issue is when there is an accident and clean up is required there is no easy way to take them on and off. You can get these from Theraquatics. There is a very similar version made by Bokers that you can get them from Independence Australia
So Secure: http://www.sosecureproducts.com/containment-swim-brief
I really like these ones, they are designed to go under a swimsuit, have velcro so getting the right tightness for containment is easy and work like a nappy cleanup wise. You can get these from Independence Australia and Theraquatics
Swimmates:
These are disposable swim nappies, so they go under your swimsuit. I found a bag of 22 for $44 (including delivery) on ebay. Theraquatics sell them for pack for $28 (plus delivery if you live out of town) . So they are a little expensive but the ease of clean-up makes it worth it. Plus, I have managed to dry them and re-use them when there has been no accidents at home. Not sure if you are techinically supposed to but I did
Here are some links to some swimsuits I haven't tried.
Splash Brand Boardshorts. Around $50 to $60: http://www.splashabout.com/swimming/disability/
You can get these from Special Needs Solutions
Splash brand swimpants around $40 http://www.splashabout.com/swimming/disability/
Again you can get these from Special Needs Solutions
Note: I am in no way affiliated with any of these stores. You may find them cheaper elsewhere.
Good Luck