I have never had to label lenses, I always knew which lens was which, no matter how it sitting in the bag.
The VCM lenses have changed that! It's a great problem to have, I love the lenses,. I'll have 4 of them once the 14 arrrives. I do need some of these back caps in my life. I have 3D printed some, but my printer can't use the harder filaments. PLA doesn't work well for very long. I could get them made, but those would be expensive caps.
Has anyone seen lens caps that are similar? I don't want the pinch caps, I may be weird, but I have never liked them. My hands are too big to fit inside a lens hood anyway. I haven't looked hard, but sometimes the microbrands are well hidden.
Sure, I could just label them myself, but supporting people making a living in this niche is worthwile.