I used a new one (they said it's new) from obsolete chevy in GA. It strangely enough is the same part number as that napa job you mentioned. 9220. 1 1/4 bore 1/4 inch line. They're all the same up to the 2 ton I guess hydrovac or no hydrovac. Now I won't have to bleed over to the hydrovac when I need to use the truck.