Adding 'Custom Wand' variant

[The Wyrm Ouroboros]

All right, so wands are spell-trigger items; to use the wand, you have to have the spell it uses in your class list. Well, I want to create a 'clacker', virtually identical to a wand, but which is use-activated - you squeeze it, with the business end pointed at (or pressed against) your target, and boom, there you go. Instead of a x750gp multiplier, it would have a x1000gp multiplier (x2000 for use-activated, x1/2 for 50 charges).

Now, I know how do this in the editor on a case-by-case basis; what I'm looking to discover is whether or not there's a way to create a blank in the editor for use. It would be virtually identical to the custom wand gizmo, the only difference being the GP multiplier.

Any suggestions?