There isn't an alternative to it at this time. Although, it's not up to Kemono to keep content updated, it relies on the users for the site to pay for the content and then share it. It's not their fault if the content you want to pirate is missing.

I’d say try those:

Http://e621.net -> you need a VPN (or similar) to access it from North Caroline region

Http://Yiff-party.com

Another question: what is the problem of http://kemono.su ?