I ordered some from Doug Valdez on
Ebay. in quantities of 8 or more, he only charged shipping once, not per item. If you leave him a message on Ebay, use his and my name (Michael Taylor) and you may get them a little cheaper (I paid a little less than he is asking for them). I told him that I would post to the MOC once I was completely satisfied. They work very well and I am pleased.