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I just got an estimate for repairs on a Cal Spa Model PSB-4 at my rental that is 10 years old. It was for $1100 to replace both pumps "that burned out just because of age".That is for two 2 speed, 240v, 4hp pumps and parts. It is obvious from checking on prices on the internet I can do a lot better finding my own replacements.Any suggestions on best replacement and supplier?Also were I can find technical specs and service info (manual) on this older Cal Spa.Most of my friends think it is not worth spending that much on an older spa at a rental.Thanks for any help