Does anyone know what modern pen refill will work with a Pelikan Silvexa ballpoint pen? You can view a picture of the pen with its original refill using the hyperlink below. https://www.fountainpennetwork.com/forum/uploads/imgs/fpn_1372030259__image.jpg I am awaiting the arrival of my new pen (picture made by the seller for eBay listing) in the mail -- hopefully, it will arrive from Spain this week; I already own the matching pencil. While I may end up using one of the cut-to-fit standard refills, I would prefer to use a refill that has color and ink-type options. Does anyone know if there might be a way to fit a different type of refill -- even one for a different pen maker -- for use in this pen? Any help and suggestions would be greatly appreciated. Thanks! : )