Techtronics is the only one that I can
think of .
But check out the retailer reviews forum they
get a mixed reception from people that have
used them.
If possible try and get the parragon chip it will
give you all regions in a manual switching format
so it safe and RCE is beaten so you can play all
discs depending on which player you have
I have a Pioneer dv717 and no disc has beaten it yet
hope this helps
Rob Kiff