Is it that big of a deal if a swatch book is a little cheap? You're gonna order the real yardage anyway. I just use the free samples from big fabric stores online, they send little squares for free. Honestly, for draping you need a bigger piece than any sample book gives you.
Little squares for free" is the problem, they're useless for seeing how a fabric moves. You need a sample big enough to fold and see the weight. I've had good luck asking fabric stores to cut me a fat quarter as a sample, costs a few bucks but shows the drape.