Best Mosrite copies are the "Mosrite" branded Japanese made mosrites available new today. They aren't too expensive ($1110-$1500) and sound/play better than originals.
They are made by the same company that made the Fillmore copies back in the 80s, great guitars.
Univox's aren't a very good copy of a mosrite, but a Hi Flier is a rad guitar on it's own right, even though their prices are driven by Nirvana collectibility (and popularity on their own right). I've owned truck loads of them, but never think of them as mosrites per se.