I took one of those spools of thread with me to Wal-Mart. In their craft section they have dowels. Fitted a dowel to the inside of the thread. Bought the dowel, marked the center, made sure I had the right drill bit (same size) as spindle to machine, and cut the piece the length needed. Drilled a hole down the center of the dowel and have several dowels the size needed for my thread.