First off, I wouldn't worry so much about not having "twink items", because Shaman are powerful soloers even without gear, and in fact gear doesn't even help all that much. Especially before level 45 there is very little difference between a twinked Shaman and an untwinked one, unless the twink has a fungi tunic. Since (by my estimate) less than 10% of new Shaman start with a fungi, you're in the same boat as most Shaman.
Second, there's a great guide on the wiki called the Per-Level Hunting guide (link in my signature) that has lots of ideas for places Shaman and other soloing classes can hunt. You could do the Karanas (starting with the gnoll reaver in East Karana and then moving on to South Karana) but as an Ogre the two sister camps are probably better. By these I mean the Nybright Sister Camp in Lesser Faydark and Sisters Island in OOT. Both camps can earn you some great plat at your level, although both are popular so you may have competition.
One other idea is Kurn's Tower, which is recommended by another great Wiki guide, the
Evil Shaman Guide. That guide is focused on evil Shaman like yourself, and while it has far fewer ideas than the Per-Level one the ideas it does have are especially well-suited for you.
Good luck.