C:\ProgramData\Labcenter Electronics\Proteus 8 Professional\Data\MODELS
If you are using these modules with an Arduino, make sure you also have the installed so you can simulate the code (HEX file) alongside the hardware. How to Add RF Module into Proteus 8.12 rf module library for proteus download
C:\Program Files (x86)\Labcenter Electronics\Proteus 7 Professional\MODELS rf module library for proteus download
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Reliable RF module libraries are typically provided by engineering communities and specialized electronics sites: rf module library for proteus download
Some downloaded models require you to point the component to a specific firmware file (HEX). Double-click the RF module in the schematic and check the properties to see if a "Program File" path is required.