You might try J&C Classic 200, not sure about the grain.
As Peter says, you can try a developer with finer grain characteristics, but often those developers contain sulfite as a silver solvent. Grain is reduced, but at the expense of apparent grain sharpness/acutance. So an alternative is to use a developer that works at higher dilutions and is a high acutance developer. HC-110, Rodinal and Ilfotec LC29 are examples.
Keys in using these developers are:
--- back off on agitation; too much agitation gives not-so-nice grain. My routine (with Rodinal 1:100) is 30sec of agitation to start, then 5 sec every three minutes thereafter
--- keep wet times short. When I can, I prefer 24C to 20C, as this speeds up processing (unless the time is short to start with) and reduces wet time. Also I use a rapid, non-hardening fix, hypo clearing agent and shorter (yet adequate) wash time.
You might also consider a ISO 125 film. A slight "push" to 200, if necessary, shouldn't hurt much.