NFS client for basic Arduino (with ethernet shield but not for Yun)?

For a project that logs movements and temperatures sensors signals, I am looking for an NFS client that could run on a mega2560 arduino + ethernet shield to store remotely binary data to files located on a NAS.
I have already googled the subject but found nothing, the "nfs client" keyword search in this forum drives to Yun's based discussions, or SD card data storage, or web server / client FTP or HTTP data exchanges.
So, does anybody know if someone has developped an NFS client that could run on standard arduino chips ?