We're trying to work something out again, but haven't been able to get anything planned for the near future yet.
If you subscribe to the Writing community already, you'll receive any email notification of a new Retro 51 project that needs voting and member input to create. If for some reason were able to run more of the Herringbone style, make sure to hit the Request button so you can receive that email notification as well.
In the meantime, keep posting your feedback and requests! This really helps us show Retro 51 how much Writing members want a return of a custom pen.