How to plumb calcium reactor off sump return

[smokinreefer]

Ok so I used a bushing to drop to 1/2"
Then threaded in a 1/2 to 1/4" quick connect

Now all I need is the valve...
I have a JG ball valve, but from all the input here, looks like what I need is a needle valve.

Now I've sourced out some, but all from the US. And these things aren't cheap!
$20-25USD +shipping...

Any ideas for a local source?
I'll call Sheret tomorrow.