What is the best place to buy parts for the beananimal overflow? Online? H.D.?

[MeanGreenEyes]

In the planning stages & gathering parts for a 30g build w/ a 30g sump and want to know where the best place to buy all of the parts for the beananimal overflow would be? Thanks!

 

[albano]

Got my parts from Lowes and HD..
have 2 sets of overflows on my 450g

 

[Aqua Pro Builder]

What's the flow rate or your return pump and which one is it?

Got my parts from Lowes and HD..
have 2 sets of overflows on my 450g

 

[albano]

What's the flow rate or your return pump and which one is it?

Hammerhead gold 5500+ gph...some flow to skimmer and frag tank...have four 1 1/2" drains and two 2" 'emergency' drains