I built my pop tester using a port-a-power hydraulic pump. They can be bought separately and fittings easily connected via NPT thread. All said and done, I maybe spent about $130 in parts. I have a port-a-power but I'm not about to fill it with Diesel after what I paid for it, so I got a separate pump for something like $80 without any of the accessories.

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1991 F250 super-cab 7.3 IDI. (rebuilt by me) Banks Sidewinder turbo, hydroboost brakes, new IP and injectors.
2003 S430 - 107K
1983 300SD - Tanoshii - mostly restored ~400K+.
1983 300SD - Good interior. Engine finally tamed ~250K.
Monark Nozzle Install Video - http://tinyurl.com/ptd2tge