First off, I'm with jackruff. Having spent a little time behind NVGs, alot of camoflage is overrated IMO.
But secondly, ghillies are really easy to make, and a good many of the Marine scout snipers I've known made their suits cheap, but good enough that humans with more advanced optical abilities were hard pressed to see them. So if you got to have one, buy a set of cammies and some burlap sacks and get creative.