Dishwasher spray arm: make/buy and attach to PVC
I'm not against buying one, and I've looked at this one, which is snap-on, and this one, which has a nicer price but it's hard to tell how exactly it might work (or more likely, not work). I mean, how would you ever attach that to PVC? And the former is a little on the expensive side.
I've also thought of making one out of PVC, since you could easily drill small holes in a piece of PVC pipe and stick them onto a T. But that has the problem of not being able to spin at all, much less spin on its own. I have searched long and hard and have not been able to find any sort of rotary union that would work (and I'm afraid even if I did, it may not allow free passage of water). A solution for spinning on its own may be as simple as making the pipes "bent," so the water would force it to spin as it goes around the corner.
TL;DR: How can I make/buy a dishwasher spray arm that can attach to PVC (actually two of them)?
And in case you're wondering, yes, this is for a dishwasher (DIY).
Thanks for the help!