I've seen gholley suits for sale online, but the best ones are homemade using local colors and by adding local vegetation, which will have to be replaced as it dies and withers.

Start with an OD or camo poncho, daub randomly with dirt and mud, and with flat paint that matches coloration in your area, and add local vegetation. Around here it would be kudzu and ironwood.

Your mileage may vary. Good luck patriots, and your get extra points and bragging rights for every blue helmet you turn in.