Question pay for permison plugins for 1.8

Hi there,
im trying to upgrade the prison on my server but I need a new plugin so people can pay in game currency to 'rankup' and obtain the warp permission for the next mine. I previously used RankSigns but that is nor 1.8 or 1.8 compatible so I need to find a new plugin or a new way to do this. Can anyone suggest for me a suitable plugin for 1.8 or an alternate way to do this?
thanks
-newo