I have two sets of new aftermarket Aisin style locking hubs. I'm not positive on the length you need and whether these would fit. They are "high" quality, but definitely not OEM. If you are running 37's, I would not recommend them. Stock tires w/ open diffs, no worries there. If this is something you are interested in, let me know and I'll dig up my pricing sheet.
1978 13BT-40, 70 series mechanicals
1966 FJ45 lwb stock
2003 100 stock
1974V8J40, 1992FJ80, 1985FJ60, 1971FJ55, 1978FJ40, 1974FJ40, 1997 LX450 all long gone.