Ordered part.for $49 inc shipping. Expected it in 3 -7 business days, but it arrived next day. Wow!
Video was excellent, but ran into probem as soon as I tried to unscrew valve from under dishwasher with 1/4 inch socket. No turning power from underneath machine. The screws must have been factory-set with a serious torque! Unscrewed cabinet retaining screws (4). Pulled machine out about a foot; removed door wheel pulley which is directly behind water valve retaining plate - 1:26 on video. (need T15 Torx screwdriver), then with vice-grip pliers, forced screw turn from screw end. It actually clicked when I forced the turn!
After that, it was lickety spit. (Putting kick plate on again is a pain).
Thanks again for the video and the expedite delivery!