if memory serves, the stock front end on the xv is a leading axle design right?
for starters, I'd measure the offset at the triple trees from center of neck to center of the forktubes plane, then measure the length of the forks from the center of the axle to the top of the top triple tree, then use a long straight edge to make some marks on the floor and measure trail. These are the numbers necessary to calculate what offset and length forks will be close to stock geometry.
I'd be willing to bet, that you'll need something in the 2" offset range and 28-32" length....
which would mean suzuki boulevard forks or hyosung gt650 forks. Maybe first year GSXR(19924?) would work too.