This monograph points to an IgG antibody assay with >99% specificity which means the false positive rate is tiny. Can anybody tell me if there is a commercial a

This monograph points to an IgG antibody assay with >99% specificity which means the false positive rate is tiny. Can anybody tell me if there is a commercial antibody test for Covid19 that advertises anything close to this? My thought is that they have done this with an ELISA. Using a commercially available (or custom made) antibody instead of using one of those terribly inaccurate chromatography strips.