Digi-Key's search tool in Multisim provides you with updated information on part availability, pricing, and specifications from wihin your design toolbox.
As you're building your schematic, you could search for the components you're placing using this utility tool developed in LabVIEW and available for download here.
This is just one of many custom instruments and analyses developed in LabVIEW for the Multisim users. The LabVIEW Instruments bring advanced capabilities of signal generation, processing, analysis, and visualization to Multisim's SPICE environment. All these add-ons could be downloaded from the Multisim Custom Simulation Analyses and Instruments page.