Yes and No!  Although you will no longer see a better buying power website or initiatives under those names, many of the better initiatives have already been incorporated in the AFI 5000.02 series or the Defense Acquisition Guidebook.  The Budget, Cost & Estimating Community of Practice at www.dau.mil would be a good place to ask questions regarding should cost and you can do a general search on the topic using the search window in the top right corner of www.dau.mil