Matching A Lock To A Key - Cubby, Mainly

anyone have any advice on modding locks to fit a key? my eunos has two keys: ignition and doors. neither work on glovebox, cubby or boot. Boot I can live with, as I'll get an electrical popper for it. Glovebox? Meh. Cubby - want this to lock so that I can park with top down and have boot safe.

Anyone any idea if the cubby lock (or any others for that matter) can be easily matched to an existing key? The cubby is a much simplified lock that doesn't use all of the points of the key...