Hi gpibssx,
There is not a set of VIs that I know of but I think an easier solution might be to use a 3rd party serial->I2C board or PCI->I2C board that has LabVIEW VIs developed to control it. The following Dev Exch. posts might help.
http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RNAME=ViewQuestion&HOID=506500000008000000BE060000&ECategory=LabVIEW.LabVIEW+General
http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RNAME=ViewQuestion&HOID=5065000000080000007A0F0000&ECategory=LabVIEW.LabVIEW+General
http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RNAME=ViewQuestion&HOID=50650000000800000010830000&ECategory=Instrument+Connectivity.Serial+Interfaces
Ron