12/20/22 UPDATE – if you’re looking for a local place to purchase refills, I recommend Pen Boutique in Columbia, MD. Great folks! Here’s the direct link to the refills, and they do ship: https://www.penboutique.com/
I’m not sure how many of you have used your pens enough to be searching for refills, but I’ve found them here on Amazon:
Black ink – https://amzn.to/3V7TpUo
Blue ink: https://amzn.to/3OqxzJs
If I find them elsewhere, I’ll be sure to update here.
These are rumored to fit: https://www.jetpens.com/search?q=prefix%3A%22brfn-10f%22&v=1 If anyone tries them and can report back the results, please do!
These might also work: https://ti2design.com/products/super-shorty-g2-mini-refill-techliner-and-boltliner Again, I haven’t tried these.