Frank, what abour fabricating your own squirters out of copper tubing & brazing. A/C fittings should do the trick & nozzles should be pretty easy to fabricate. Maybe $20.00 in fittings. Figure volume through each nozzle VS. oil pump volume. Seems that the nozzles shown on that site taper to give a stream. You could do irrigation type jets that would provide a mist. Or check a Mcmaster Carr catalog & find something more suitable. Even the misting effect shoiuld provine significant cooling effect, as we all know by them personal mister bottles you see everywhere. Worst case, it'd cool the rods & surrounding block volume.

Ed