I wouldn't be happy either' how can someone abuse something that you have worked so hard to create.:nonono:
They have no respect, they expect to actually use the pen and not fit any refills
You either need to change your custom base or make sure they don't use the pens for what they are actually made for..
Can't imagine what anyone would put it in make up remover for, ever thought that they had used it to apply the make up instead of writing with it? 
I sont have a direct replace,net for the Baron but do have some separate feeds if you are stuck.