Please see the following websites for an updated list of NIH contacts (program officers--aka "Scientific Program Contact").
F31 contacts:
https://grants.nih.gov/grants/guide/contacts/parent_F31.html
F32 contacts:
https://grants.nih.gov/grants/guide/contacts/parent_F32.html
K01 contacts:
https://grants.nih.gov/grants/guide/contacts/parent_K01.html