Hi Paul!
The Fuses are compatible for multiple Nintendo DS consoles.
For example you can buy those: https://www.aliexpress.us/item/3256806546401159.html?spm=a2g0o.productlist.main.5.7f81399diiv2Fo&algo_pvid=9b67b95d-73ef-44a0-91c8-82caee1ac99b&algo_exp_id=9b67b95d-73ef-44a0-91c8-82caee1ac99b-2&pdp_npi=4%40dis%21EUR%211.96%211.96%21%21%212.08%212.08%21%40211b81b117158605777318213e8185%2112000038121700597%21sea%21NL%210%21AB&curPageLogUid=n01Ai9r220js&utparam-url=scene%3Asearch%7Cquery_from%3A&gatewayAdapt=glo2usa4itemAdapt
Regarding the EM1, you need this: https://www.infinitydream.com/regulateur-charge-em1-dsi-3ds-p-752.html?language=en (I think they are located in France, but they ship to the States).