I designed this to replace eraser caps on my favorite mechanical pencils. I've printed them with many types of resins and many colors. They are fairly thin, and you'd need a pretty good FDM printer to be successful, I think, but give it a try and let me know!

Anycubic

Photon Mono SE

Yes

Yes

.05

Using resin printers, usually ABS-Like or something similar, although standard resins work fine too. Just make sure you've calibrated to avoid excessive blooming so it will fit.

Using Fusion 360 and taking measurements with a cheap set of Harbor Freight calipers.