Well, I followed the advice of
VegasTriker and went with a Maxxis Torch BMX tire for the rear. Correct size, 120TPI construction, 110PSI max. The best I could find for the 16" front was a Kenda Kwest. That tire (in whatever variation) has been rated as high as 110PSI, but the one that came in is marked 65PSI. As far as the front tire is from the rider, 65 should be fine. Thanks for the help. Ride on, all!