Ok, I think we can do something here.
Here's one option:
go with the Unablock, and use a Via pump (possibly two). That's 37$ plus shipping.
Here's another:
Ditch the core, pick up a copper one at an auto part store for $20-25, use either a Maze3 (new copper top, 35$) or a Spiral ($40) and use either a Danner (?$) or Rio (20-35$, depends on size) pump.
You'll still need tubing, clamps, and either a "T" or an airtrap, whatever you prefer.
As for the anti-corrosion agent, Silkolene is the only one that only requires 1 oz for about a gallon of water, most others require 4 oz/g. Silkolene however is very expensive ($11+ $10 shipping), where the others can be had locally (depending where you live) for $3-5.
BTW: congratulations!
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