I'm sure it's been posted before but furniture can be made depending on the style and skill with woodworking tools (I have made many a bench and chest from scrap lumber), and always check Goodwills/Thrift Stores/Pawn Shops and most definitely Garage sales for any clothes, shoes, knicknacks, haversack stuffers or unique item.
Also, a lot of these things pricey items like soaps, tobacco pipes, waterproof tar cloth, and etc. where sutlers and merchants have the markets cornered can be made at home in large batches!
Nothing looks better than a "home-made" look than a foreign copy. If you can help it ofcourse.