If all else fails I'd try a Boye #2 or 1x7 sewing machine needle if more available than 13x1. Organ makes a small shank DBX1 at 1.60mm, others can be larger as mentioned. I've had mixed success with using DBX1 on my Model 12's due to larger shank. I'd be curious to hear if a 12x1 or DBx1 has enough length to work in the Model 13. Also, Steve's 46x1 Glovers needles which are still available might fit the bill.
Good Luck
Jon
Last edited by jlhmnj; 11-10-2015 at 04:52 PM.