Linn's SPKR005/1 (LS150 HELIX) and SPKR012/5 (LS-150 HELIX/INDEX-II) - Replacements ?

[tiefbassuebertr]

Linn's old tweeter from first speaker series (Isobarik DMS, KAN, SARA and even NEXUS) are based on the 50 years old Scan-Speak D2008 and replacement is still available (produced from Hiquphon model OW-1 - even Scan Speaks D2008 is still available) - go to the images 1-3 and
https://www.scan-speak.dk/product-families/classic/

But what about the tweeters for the HELIX (first series) - go to image from No 4 and HELIX/INDEX-II (images post #2) ?

 

[tiefbassuebertr]

Images SPKR012/5 (LS-150 HELIX/INDEX-II)​