I have a mod for Battlehorn Castle that adds COBL things to it (alchemy sorting shelf, grinder, alchemy books etc) and I want to know if there is a similar mod for Frostcrag Spire that adds COBL stuff to it.

Perhaps something like this: http://www.oblivion.nexusmods.com/mods/33698. FYI please use mod detectives thread for looking for a specific mod.

There's also this one that has a COBL option: http://afkmods.iguanadons.net/index.php?/files/file/534-afk-frostcrag/