He asked for 5670 to 6922 which is what I gave him, I didn't see the reverse on their website; that aside here is a link that grannyring posted short while ago under the MHDT Orchid vs Amber 3 Forum for a site that he said his buddy found the adapter at for his Orchid
http://www.garage1217.com/garage1217_diy_tube_headphone_amplifiers_012.htm
http://www.garage1217.com/garage1217_diy_tube_headphone_amplifiers_012.htm