erofa Majohn A1 Fountain Pen Replacement Extra Fine Nib Part

Majohn A1 nibs will fit in the VPs. Amazon has them (in a pack with a converter as well) for $19. https://a.co/d/064X2lus

The Majohn A1/A2/A3 converter will fit. It’s a more conventional converter. Here is an Amazon item (Unf also includes a nib): https://a.co/d/0c0jxRFA But a lot cheaper on Ali Express