Thanks Outahere!
I just ordered: Koken 313A-1 3/8 inch drive tap socket, Koken 313A-2 3/8 inch drive tap socket, Koken 2772Z 1/4 inch double joint universal, and a Koken 2772Z 3/8 inch double joint universal.
I compared prices online and ordered through DRPD as it was less expensive. I called DRPD on the phone as the tap sockets are not shown on their website but they agreed to place an order for the tap sockets then ship everything in a few weeks. An interesting note, I have the Lisle tap sockets and they are awesome. However, I have Craftsman taps and the Craftsman #8 tap does not fit in any of the Lisle tap sockets. FYI-I have used the company Irwin adjustable tap socket at work, it is just ok, made in China and it loosens sometimes during use. I have never used a Koken tool before but I am looking forward to putting these to use.