modify categoriesblock.ascx to display a catalog

Is it possible to modify the datasource in the plugin categoriesblock.ascx to show a list by catalog instead of a featured list?

Current code is:

FeaturedRepeater.DataSource = bp.Catalog.PartsListFeatured(DisplayNumber, bp.CatalogCode, bp.AccountID, bp.PriceList);

I have a catalog for specials that I want to show in the same way that featured items are being show as.