Thank you for your inquiry. Yes, this size is made in the Katana. Please contact our customer service at 1-877-883-6276, M-F 9:30am-5:00pm Mountain Standard Time to place your order. We will need to create a special order since we do not currently have this size in stock. It will take approximately 2-3 weeks to get the item from La Sportiva.
To give you a little direction, I have these shoes and normally wear a 44 EU (street shoe) and I wear a 42.5 in this shoe and it's still a bit tight (works for me, I've had them for about 5 years and they've been resoled a couple of times). They haven't widened out much, but the leather above my toe knuckles has stretched out to make a nice pocket. I would recommend with starting at the 37 and also review our Fit Guarentee: http://www.campsaver.com/warranty-returns/. We'll help you get a size that fits you best if it doesn't work with the first order.