Your pond is probably built by now, but I have had very excellent results with Pumpbiz.com for the pump (only equip they carry for many industries). The Tech spent a lot of time working out what I would need, knew the application well, and gave me the lowest price I ran across on the internet, and cut it a bit for shipping fees.
Birdnest.com for liners was the best price for EPDM Firestone liner /underliner when I figured in the freight (ships "free")and no CA tax (they are in Ohio). It was way cheaper that I could get it here in CA, and they were the lowest on the internet I found.
Happy building...
:goldfish: