That is an old and inefficient led. It’s 6 volt so it’s needs a boost driver which was difficult to make back then. Plus 90° head lights were not as popular back then, either.
At the moment, you can get xhp35-HI, xhp50.2 and xhp70.2, but they are pretty pricy.
Jason, there are two overviews about headlamps in German, but with Google translate they should be fine.
Maybe you want to add the links at the end of the list?