Create Custom Object Link Type in SAP PPM

Dear Experts,

I have a requirement where I need to link PPM system with R3 system to fetch the data for Vendor Master (LFA1-LIFNR) in search help.

In standard PPM there is no Object Link available for Vendor. So wanted to know is it possible to create a custom Object Link

along with the OLR3 Proxy class, Search Help structures etc.

Any inputs will be helpful
.

Thanks in advance!