We can supply 31-D , send us a request quote to request 31-D pirce and lead time.Chipdigger.com a professional electronic components distributor. With 10+ Million line items of available electronic components can ship in short lead-time, over 250 thousand part numbers of electronic components in stock for immediately delivery, which may include part number 31-D.The price and lead time for 31-D depending on the quantity required, availability and warehouse location.Contact us today and our sales representative will provide you price and delivery on Part 31-D.We look forward to working with you to establish long-term relations of cooperation