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almost every major and most minor brands of forklifts have an offering of pallet jacks. and there are a number of mainly pallet jack companies too.
Jungheinrich has had some jacks that might be considered as "price-point" or "economical" rather than "heavy duty", depending on the operational cycle, where a number of other brands may be more "heavy duty" or "full shift operational" focused.
I would suggest you check what "big lift" (also known as "big joe" here in the States) has to offer.