Get statistic logs for specific luns inside nar files

Request to discover the performance and statistics on specific luns, in order to calculate the minimum wan bandwidth for recoverpoint. After i gather SP collect and nar files (statistic files to be used on analyzer helper or MiTrend) from both sites (production and disaster), i want to isolate specific luns that are replicating (not all of the luns are replicating) with RP/SE. How  may i modify the nar files in order to get only the statistics for specific luns and not for all of them ?