Wood box, in lay lexan for top and front. You'll need to drill a couple holes for the skyscreens to be placed and done. I know a gentlemen is making them for this purpose, have seen a similar design posted on here before.

If you have a shooting chrony they make a splatter guardthat is meant for use with paintball guns..not overally durable but isn't a huge investment either(I believe around 15 bucks).