Closest thing I know of is bitbean with 20mb. Although I think the DEV abandoned the project. 
big surprise
big surprise http://www.bitbean.org/about.html#
Quote from link
Quote
BitBean is based on a pro-Gavin proposal for a Bitcoin 20MB block size fork. Why wait to see if Bitcoin will ever change, BitBean started out from the beginning with 20MB blocks!
I guess bitbean is based on Gavin's modifications .