You can find Proteus-compatible models and footprints by searching for the IR2153 on Component Search Engine .
Frequency is set using one external resistor ( RTcap R sub cap T ) and one capacitor ( CTcap C sub cap T
Avoid executable (.exe) files claiming to "auto-install" libraries. Stick to manual .LIB and .IDX files or .PDIF (Proteus Device Import Format).