If your happy with reproductions Steve Bailey used to make stainless steel version as BBB Fabrications . He still appears to be on Facebook here Steve Bailey | Facebook . I couldn't find his old company FB page so unclear if he's still around or making stuff anymore. He also used to make 900SS frame braces to deter the headstock frame tube fractures.
Thanks Macca Just tried the link and it appears as no longer available, his hangers and brace would be perfect.
Try searching for Steve Bailey on there it did find him but not his old pagehttps://www.facebook.com/photo.php?fbid=856739471055314&set=a.472481276147804&type=3 has a landline & mobile number on the pic hopefully it opens ok
I just tried to private message you but it seems you don’t have your account set up to receive messages? could you try sending me a message?