Thankfully, loot-generated silver-threaded (and other metal-content) handwraps appear in much greater numbers in-game now, as of Update 14. As I mentioned, you can craft these, or have a friend with high crafting skill craft low-number enhancement and a "Righteousness" shard to give you basic but effective Silver-Good DR bypassing if you can't craft "Holy" or "Pure Good" shards yourself.
Keep an eye out in the auction house for these, or Byeshk, Cold Iron, and Adamantine-laced wraps. Mind you, some people try to overprice these, even those that have little useful prefixes or suffixes. Just be patient and find the ones you need.
You can always use kamas or quarterstaves that are Metalline of Pure Good, which may be much easier to find.
Editor, The Book of Syncletica 2nd Edition: An unofficial DDO Monk Guide, and Stormreach Shadows: An unofficial DDO Stealth Guide(Stormreach Shadows updates are in indefinite hiatus.)The Order of Syncletica: A DDO-flavored blog on Monks and gameplay and more