I've been using this old one based on 3.5.13 for a while, but it has some annoying bugs which were mostly fixed in the latest release:
http://murga-linux.com/puppy/viewtopic.php?t=73612

So I am looking for an updated SFS containing a TDE R14 setup for x86 Ubuntu Trusty.

I've tried adding the official TDE repos and installing, but after a while it went out of memory and failed.

You can build the SFS even if you are not running Puppy Linux, you only need mksquashfs:
    $ mksquashfs /opt/trinity trinity.sfs -keep-as-directory

Thanks for your help!