When they sell out, here's another option:
https://www.anime-export.com/index.php?product=79875
and this is now live, same price as anime-export, 3000yen more expensive than HLJ
https://hobby-genki.com/en/dx-chogokin/33076-dx-chogokin-vf-31j-supersiegfried-hayate-immelmann-use-revival-ver-4573102664181.html