Looking for a modified build

Hey there not sure if this is the write forum section but this is my issue.
I am wanting to update my server to version 1.7.2 but a plugin I need has yet to be updated and no longer works. I have read and seen on servers that they just run a modified version of 1.6.4 to allow 1.7.2 clients to connect. I want to do this but I am not sure where to find it, or whether all of my plugins will still work with the modified build.

Could someone please link me to a build that supports 1.7.2 connections but will still work fine with all 1.6.4 plugins? I am fine with there being no 1.7 features.