Sys restore doesn't 'backup' data files (ie fonts) it only takes a snapshot of system files eg .exe's and .dlls reg entries etc.
Try something like GetBackData do a google on it.
Big problems is if the space on the disk where those files were, has been written to.
After emptying recycle bin, the actual files are not deleted but only the reference to them is. The files are still there but are treated as 'unused' space, ready to be written to. If there's been a lot of saving to disk then they maybe beyond hope....
...cos we\'re travelling...at the speed of thought...UltraMagnetics