a gauge is a gauge at the end of the day, you dont have to pay defi prices to get a good reliable gauge, if you are seeking one thats purposeful, which it seems to be (if you're just after the looks then you'd want a full set with all the electronic stepper motor wizardry, but thats really not needed). a good mechanical gauge from the likes of omori, pivot etc would be a safe bet, or one of the non-stepper motor electronic ones if you are after something a bit more modern (and plus it means only two wires enter the engine bay rather than a braided hose line).
omori would be a good bet if you can find one, i imagine you could pick one up on ebay for about 50quid.