A small GUI Tool for Adding Index tokens to MetaMask tokenlist that solves this issue at SVET-Rating/SvetIndex#7.
This is a bounty program which is sponsored by SVET Ratings. More info can be found here https://gitcoin.co/issue/SVET-Rating/SvetIndex/7/url
Visit here https://mitmelon.github.io/Token2Mask to use this tool. If you have any issues please open an issue.