Digital BW, The Print

Any suggestions on taming some really grainy tri x scans that were 
shot about 25 years ago. It looks like they were over developed as 
well, so they are very contrasty with large reticulated grain. Would 
like to make some prints from these, have tried USM on a layer, then 
adjusting the layer transparency to allow some sharpness thru, and 
using alpha mask tricks. Seems to work farily well, but it needs
more. 
I also ran them through noise ninja, and that is somewhat successful 
at removing the grain. Any other suggestions for making these grainy 
scans into a creamier print?