I think you just find a smooth-looking internally-cammed QR skewer/lever in a high polish or anodized silver finish and call it a day. Shimano made a ton of them, especially as the late-'80s came around and into the early-'00s with then still-silver groupsets. Externally-cammed QR's with that cupped washer are garbage at holding a wheel into a horizontal dropout, so avoid those. They were made when the world had moved on from horizontal dropouts, so it's not the QR's fault as they didn't need to account for those forces.