i think he means the mechanical type fixed posed hands like the ones w/ the 1/48 GBP. the ones w/ black finger joints.
well, you could always use the ones that came w/ the 1/60 ver.2 DYRL valks, although they look to be too big for the new 1/60s. maybe w/ the armor on it won't look as big.
that could be another reason to wait for the add-on GBP only set... maybe Yamato will include the mechanical hands then, as another hot fan request...