No direct experience, but the JBL 1200Fe is highly regarded (and
distortion plots are very impressive), but it is a ferrite driver.
If you want to stay with alnico magnets you will likely only find vintage drivers, like the Altec/great plains audio...
But while we are a t it, if you like alnico magnet maybe you would like field coil drivers even better:
http://www.kilimanjaro-series.com/
Supravox also comes to mind
Another option would be to commission Davis to build a special version of the 31TCA12 with an alnico magnet (similar to the
unobtainable JMF version), but the price will likely be similar to the AL1103 (and probably even higher for only 4 drivers on special order...).
EDIT: oups, forgot you only wanted paper cones!