I discovered the Uchida Proeraser some while ago while browsing the uncomfortable chair. It is a nicely-finished all-metal clutch holder for erasers. Most unusual.
The one I ordered came with an ink eraser.
As it takes an eraser of 3.8mm diameter, it occurred to me that it should be able to handle a 3.8mm lead. A less common size, Pilot, Koh-I-Noor, and Caran d’Ache all make leads and holders in this diameter.
The most accessible pencil in this category is probably the Pilot Croquis, available at many art supply stores.
I put a Pilot refill in the Uchida – and found I had a very usable and nice looking 3.8mm clutch leadholder.