In looking for a stepper motor amongst old parts in my lab, I found one with a sticker that says buildyourowncnc.com and PN SM60HT86-2008BF U2 on it. I found a Q&A on your website that says it's a NEM
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The motor with that model number is here: https://buildyourcnc.com/item/electronicsAndMotors-nema24-425ozin