The fountain pen I have was handmade by one of my brother's teachers and now I want a calligraphy nib and I need some replacement inks. The problem is, I can't remember what website she uses to get the nibs and inks. Here's a photo of the nib and you can see the threads where the pen part attaches? This is my first fountain pen and I just want to be able to do calligraphy with it. Thanks, April