Try eBay for the Field Magistrate. I had an early version I bought for $20 at a Reebok outlet. I can see why a U would like the TPU toe cap but they're a bit heavy to wear on the wing.
The Zig models were sold under the Vero turf trainer line as I recall. I bought the white bottom models when the state supervisor joined the 21st century and allowed white, then turned around and ordered the all black model when our RSO didn't follow suit
This summer I'm trying the Nike Lunar MVP Pro baseball trainer and its lighter general trainer cousin, the Nike Lunar Edge 15. Again, both probably have too much white to satisfy my RSO. The sole treads are very similar to the old Nike Air Diamond Anniversary, which was the first turf model I ever had.