The 126A is lack luster. Both 122A and 129H are great. Mind you my experience is with the 122A in the L65A. The L65A is fabulous. It will not disappoint.
The 128H-1 is the acoustic equivalent of the 129H which is standard in the L65B. In the L65 and L65A, it's not so therefore they need to be replaced as a pair when only one misbehaves there. The 126A and 122A became NLA for the L65/L65A