Triple 8 Bumsaver comes in two lengths. Just search 'padded shorts' on Amazon. I'd link, but I'm on my phone. It's the first two items in 'Sports& Outdoors'.

EDIT: http://www.amazon.com/Triple-Eight-Bumsaver-Black-Medium/dp/B004IUJEDW/ref=sr_1_1?s=sporting-goods&ie=UTF8&qid=1390233352&sr=1-1&keywords=padded+shorts