I plan on doing the same thing. I haven't called around locally, but they are available online at irrigation places south of the border for around 40 dollars U.S..
I am stuck on what pump to use for the 584. If I replace the becket with the mazzei it will have some pressure to overcome with the water level in the box. I don't think a Mag 5 will cut it.
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-=Bryan=-
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