How to remove all part-number which is having underscore "_" in there name from repeat region table?

Hi,

We are having part type as BOM or Non BOM (Dummy), BOM means actually going to production and dummy is just to show ( not mfg.). So in model tree we have dummy parts with extension as underscore "_"  e.g. 123456789012_BRACKET ( Non BOM). and we want to show its BOM number in repeat region as 123456789012 and for other component which is having BOM number will show as it is.

So please can anyone help me to do this through repeat region options or toolkit program.

Thanks,

Prashant Pandarkar