I'm not sure there's an easy answer at all, short of digging your depth gauge out and checking out what the console's "socket" is shaped like vs. what a potential new computer is shaped like underneath -- even if the computer is the same nominal "hockey puck" diameter and thickness as your depth gauge.
Like, the Aeris Atmos 1 computer, though supposedly a "standard hockey puck," has two sets of lugs on the underside; they're like the lugs on your watch into which the pins go to hold it onto your watchband -- and they're meant to do the same thing if needed. I suspect other Aeris models are similar.
Trouble is, there has to be clearance for those lugs in the console socket -- or for that matter in a generic wrist boot. If the clearance isn't there, you'd have to do some careful modification of the lugs (as in cut them off with a hacksaw). Ask me how I know.
On the other hand, the Oceanic Veo 100 -- another "standard hockey puck" -- doesn't have those lugs.
Other than that, you may need to cut a small hole in the side of the console so that water can get to the activation contact easily. And maybe add some kind of spacer so the computer doesn't rattle around in the console, like I had to do with my Oceanic.
All of this is do-able; just needs a little bit of DIY.
Oh, if you're tempted just to buy a new empty console for $25 or so, again make sure it's designed for a computer or you'll have the same problems. Aeris makes two versions of their boot, that look identical on the outside; but one is designed for a computer (has clearance for the lugs), the other for a depth gauge (no lug clearance -- hacksaw time).
--Marek