One option is to make your own items to unravel, and gain both from making them and unraveling. See the guide to that effect in this forum or its subforum.
Another option is to do Treasure Maps and SOS/MiBs. They tend to have a lot of items to unravel, for a little effort, with up to 30,000 gold, gems and reagents as bonus items. Ask in the general chat channel, and you might even be able to find Treasure Hunters and Fishers that will give you their excess loot (that is low end) to unravel - I give mine away if I can, on Lake Austin (and if no one takes me up on it, I junk the stuff for cleanup points - antique stuff is worth 0 points, so I'd rather let people unravel it).
When looting stuff for unraveling, your best bet is to hunt creatures with a larger number of loot items, that aren't generic items.
Orcs, for example, are bad, because most of their loot is NPC normal stuff. same goes for bone knights.
Look at the descriptions on web sites, for the contents of champion spawns. Find out where the creatures that are used as stage 3 and stage 4 champ spawn monsters spawn in the regular parts of the game, and hunt those (daemons in Tram Hythloth, Fire Island Temple and between Compassion and Chaos in Ilshenar, liches south of Yew, etc.) They are more likely to produce more low-to-mid level items to unravel than higher-end hunts like miasma, etc. (And with the big creatures, there's often a respawn while you're still looting). If you can team up with someone, one of you could loot while the other hunts. And, don't bother with items that weigh 50 stone. Each one takes the spot of 5-25 other items you could loot for unraveling.
