OTOH, looking at your earlier post, you said it had a 90vdc, 70 watt motor. So a home sewing motor could replace it, but you probably want to change pulley sizes to a ratio that will slow down the max speed of the head, if it's in danger of exceeding the 4000 to 4500 stitches per minute rating. Was the original motor 90 or 12vdc, and what amperage?
hope I'm not just obfuscating the situation!