Yes, you can buy the following parts of the RIIM development kit individually:
RC1882CEF-IPM-SB – The RIIM Sensor Board – A board with a RIIM module and 7 industrial sensors.
RC1882CEF-IPM-DB – The RIIM Development Board – A development board with a RIIM module.
RC1882CCEF-IPM-BRB – The RIIM Border Router Board – A development board with a RIIM module.