Import Substitute and Related Item relationship via Import Manager

Hi! I have been able to import parent/child relationship (captured in an Excel spreadsheet) via the Import Manager. I have tested with BOM and Sales Packages and it worked fine.

However, I now also want to be able to import relationship such as substitutes and related items and found out that this feature is not available in Import Manager. I cannot do this via matching in Data Manager as there is a similarity in the part number used. However, I guess it may be possible if I introduce a new field to somehow link them together.

Has anyone tried to do a mass load of relationships like these before? If so, would appreciate if you can share your experience in this.

Cheers!

SF