Interestingly enough, when I search the Sam's club website for "Tramontina Beverage Cooler", I get This Frigidaire, which looks exactly the same, has the same 4.4 Cu ft/126-can capacity, and the same 32-60F temperature range. I suspect it is the same model with a different label on the front.
If that is correct, it will definitely fit a brew bucket or a ball-lock keg.
Were you able to confirm if this Frigidare is the same as the Tramontina?