Good luck finding one. Lincoln furnace was a small manufacturer that was more of assembly point. They made the cabinets BUT all the components that went into the furnace were off the shelf. All parts for there furnaces are available but you will just need the original part number off the parts to get them Or know enough about electric furnaces to know what to use in the original parts place.
Lincon put a wiring diagram on the back side of the blower door access panel and the clerance to combustibles is listed on the model number tag as required by law.
Sorry but that is all I know about Lincoln.