I had one of these for quite a while and wanting to have a pair I went looking for info.  I received the info I needed from someone on this site, so thank you Phart010!  That being said I wasn't looking for one and then one should appear for sale, cash paid and a very happy collector.  I only need another 10 so will be on the lookout.  If anyone has any to sell or can point me in the right direction drop a message!