Steve, the Hi-Lift jacks are very reasonably priced, I think mine was less than $60 a few years ago at tractor supply.
Looks like they are still less than $70 for the 48" red ones in most places, shop around town to save shipping.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-