Yes, the 7 7/8" 25QX2 is still available in our offering. I will have to check global inventory for availability, but generally these need to be forecasted for manufacturing.
I would be somewhat concerned about how this "sealed bearing" product would perform at Phu Bia due to the historic wear patterns of the bits there. Unless there has been a
change of recent, the bits always core ( inner insert rows wash out leaving the nose area exposed and the thrust bearing area fails ) and the bearings fail.
This QX series bit is designed for when conditions tend to cause bearing failures before cutting structure failures. Cutting structure wear is the mode of dulling at Phu Bia unless as stated, the conditions have changed