Up on Amazon US, if anyone's still looking for this. Ships from and sold by Amazon.com from the looks of it.

https://www.amazon.com/dp/B097B15RT8/ref=cm_sw_em_r_mt_dp_MVRS702PDFMBV7WK8KR9

Metroid SE is available in Amazon now in regular price but low stock: https://www.amazon.com/dp/B097B15RT8/ref=cm_sw_r_cp_apa_glt_fabc_CM436NK7DCV4QYY8YYRC