Here, see if these links help ye' out a bit:
Glave's Textures and Converted Meshes (http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=11142.0)
Eaglify's Meshes (http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=17569.0)
Tetsu's Converted/Handmade Meshes (http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=18553.0)
There's a castle here: http://tradecave.friendhood.net/t154-slycan-s-3d-shop-freebiessalescommissionstrades (http://tradecave.friendhood.net/t154-slycan-s-3d-shop-freebiessalescommissionstrades)
Weapon meshes and some very laggy castle pieces here: http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=11142.0 (http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=11142.0)
The Amnesia pack has a lot of nice medieval-like furniture and an eagle and a lion statue, and a bridge - and there's also a whole bridge pack: http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=18553.0 (http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=18553.0)
Swamp water: http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=11171.0 (http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=11171.0) and http://feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=14355.0 (http://feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=14355.0)
Here's some items that may help: http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=17047.0 (http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=17047.0)
You might like some of Drek's particles: http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=7990.0 (http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=7990.0)
These aren't spell books, but you might want to use them anyway: http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=16213.0 (http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=16213.0)
I hope this helps. :3
Good luck
I convert meshes for free so if there's anything specific you want just give me a holler ^-^