I ordered g10 liners from Amazon for about $10. I traced the CPK scales with a permanent marker onto the g10 and rough cut it with a pair of scissors. Its pretty tough stuff, tin snips would probably work better. I used the marker to outline the holes and drilled them in the center. All but one hole was spot on, I used some rolled up sandpaper to open it up a bit. I then reassembled the scales and sanded to fit, some with a Dremel and some by hand. It was a slow process.
A word of caution though the DEK1 will be harder because of the jimping on the back end will make it a slow tedious process (at least the way I did it). You might want to try and trace the knife handle itself instead of the scales. Now that I think of it that probably would have been a little easier.
Like you I really wish they made some liners so you can thicken the grip and add a bit of personalization.
Please post pics if you tackle it.
Kevin