Anyone know where i can find this kotatsu replacement controller?

hello! i hope everyones new year is going well.

I accidentally broke my kotatsu controller and am having a hard time finding a replacement. Its a specific 3 prong plug in, but its in an odd placement. i looked everywhere but can only find ones that have already been sold out. the exact controller is for the ctr-600ht. i would be forever grateful to whoever can help me find this. here is a reference link to one that was sold already https://paypayfleamarket.yahoo.co.jp/item/z500375928.