I need to query 67 mpls routers for thier ssh config'ed capability AND for the size of the RSA key.

Problem is, some routers are reporting to HPOV that the key size is too small >>

ssh_rsa_verify: RSA modulus too small: 512 < minimum 768 bits

key_verify failed for server_host_key

I'd like to use an SNMP mib walk to get each key size but can't locate the OID for that object..anyone know it? (I use the MIB Locator and Object Navigator but can't find it there).