Mordengaard

Hi everyone! I am leveling a dwarf paladin right now and I would like to purchase a mechanostrider on level 40. So I need to be exalted with Gnomeregan Exiles. I am going to complete all the gnome and Gnomeregan quests but that won't get me to exalted reputation. I don't mind the time or money spent on this because that's my favorite mount and I really want to buy one on level 40. I heard that I have to donate silk clothes. What else can I do to farm reputation? Approximately, how many clothes will I need to donate? Thanks for your answers.

Thanks!