I have made a replacement for a 6E5, 6U5, 1629, 6X6 etc.. tuning eye, tuning indicator, magic eye, electron ray tube. It uses a circular array of green LEDs to approximate the look of the original tube. It fits in the original tube's space and can be installed without modification to the radio. I have also done a 6T5 version for Zenith fans. (see    • A Solid State Replacement for the 6T5...  ) Unpopulated circuit boards for both are available. See rabjohn.ca/gord/ss6e5 for details.