@guilleguillaume
Sorry if I offended you or anyone else here, it was not intentional. HaveANiceDay and Ripster have both stated more than once that the correct thing to do is to find a Topre keycap manufacturer, and Ripster even suggested posting to Japanese forums, but it seems no one is willing to do the work of tracking someone down. For what it's worth, I'm interested in custom Topre keycaps as well, it's just from reading this thread, it doesn't look like it will happen.