Just come across this, don't know if you all know about it so thought I would post in case, looks good
http://www.bitsforpets.com/snugglesafe-heat-pad-with-free-cosy-cover-p-1556.html
http://www.bitsforpets.com/snugglesafe-heat-pad-with-free-cosy-cover-p-1556.html