No they don't appear to.  But since they only neck size, a .308 die with a base the proper size for the 30-40's rim would work.  The .303 British die set might work, at least the rim diameter would be correct.  It would depend on if it sizes the neck down small enough for .308 bullets.  I checked Lee's parts, I don't see any of the bases available as parts.  That's a part a fellow is likely to misplace!  If you were figuring on using cast bullets of .310 diameter or larger, the 303 set would work for sure.