> I'm surprised Mouser is no longer carrying either the (NJM) 13600 or > 13700!
Wait, no need to panic! If you just type LM13700 and hope it does a proper cross-reference it shows as being obsoleted and non-stocked. But when you do a search NJM13700 in the IC section it comes up with a # sign in the part number (lead-free, I guess):