You might want to use Acufine (approx 14 min @ 68F)...and add to its effect in the darkroom with the diffused exposure you often use. This may be less grain than you are trying to get...but it certainly gives the haunting old look that may suit your purposes...and more, it give very good detail. I just got good results shooting TriX @ 3200 and processed for 30 min @68F.

good luck