Yikes! $50 bucks and more for a squeeze bulb and 30" of tubing?
I put mine together for under $20, all purchased at Home Depot. I maybe spent 2 hours putting it together.
Mine is a stripped down version of this....
In my simplified version I used 1/4" vinyl tubing, rigid copper tubing (the chrome plated toilet riser mentioned by Captishmal) and a squeeze bulb primer intended for flushing radiators. I ommited the table, plywood pedal and pipe and fittings on the riser.
I also didn't bother with any threaded fittings on the connectors. Instead I sized the vinyl tubing for a good friction fit on the copper (a 1/2" long piece of heat shink tubing over the copper made for a perfect fit)
I wanted my 5 gal. bucket to still be useful as a bucket for other camp chores. So instead of the drain fitting at the bottom I drilled an oversized hole into the rim (above water line) of the supply bucket. The supply line is cut extra long so it reaches the bottom of the bucket and I added a 2" section of the copper to the sucking end as a weight to insure it sinks to the bottom.
I bought a plastic spring clamp that fits over the rim of the bucket and drilled holes as req'd to support the copper parts. The copper is easily hand bent in large radius (over 4") for tighter bends fill the tube with fine sand to keep it from kinking.