I sent an email to JetPens' CS, and they're usually quite good about responding. I did try to go through RayMay's site, but it's in Japanese, and the Google translator is not working so spectacularly with it. Ah well.
Edit: the one thing that works so far is my .35 Rapidograph, which also fits in the pen loop. I can live with that for now. I am currently digging through pen pal letters, because I know SOMEONE wrote to me on TR, and I'm going to compare it to what I've got in here now--I'm suspicious because the paper doesn't feel quite as smooth as what I recall. I am also going down to a Kinokinuya Bookstore in the near future, and with luck they will have some inserts that I can check out. I'm on a mission!!
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