tomj,
1. With your stated a minimum (ideal)working aisle width of 83" with a 40" wide x 48" long pallet load and not wanting to use a unit with straddle legs don't think you will find a unit. The Linde e 10 requires an aisle width of a minimum of 110"+ 6-8". operating clearance but only has a basic lift capacity of 2200 lbs & would derate further when equipped with a side shift & triple mast plus it has a proprietary control system (a growing trend in the lift truck industry).
2. There are 3K electric, stand-up end control units (e.g. Clark ESM15S) or sit down 3 wheel lift with a short battery. Some of the old models were equipped with a GE SCR controller. This web site compartment has button on the left side called "Spec Checker" you can look up a lot of information on current & older models by brand name. What you need to look at is the spec titled "right angle stacking (working) aisle". In most cases this is a dimension without load length & operating clearance - you need to add your load length + 6-*' for clearance. In some case - European models or Asian units will have the aisle required with a specified load width & length.