In my opinion, CAT makes the best pumps in the industry today. The seals in the pump tend to hold up for a longer service life than any other pump in the industry today. I would highly recommend the Pressure Pro model EB4040HC.
Also, FNA group makes the AAA pump, and in my opinion these pumps are not even close to the quality of CAT. I have attached a link for you to view the unit I am recommending.
EB4040HC