(Well look at that, after three years or something, I've found my original login)..
Looks like the Kerry might use a T-slotted topslide, if that's the case a wedge- or piston- type 'Aloris' (or clone) should be a fairly straightforward 'slide-in' unless the Kerry uses some obscure 'nut' size – these toolposts mostly come with a stud and large flat T nut as standard, originally intended to replace the lantern-style toolposts that were then still common in the US..
I'm sure you'll find dims. somewhere on the 'net.
The wedge-type is a good toolpost, solid and repeatable in use, with cheap to buy / easy to make holders..