need some nipples

aw...........get your mind out of the gutter. I am needing the heater hose plugs that goes in the intake for the heater hoses. they are 3/8" NPT thread and I am not sure of the nipple size for the hoses. I think they are 1/2" and 3/4" or 5/8". I have an Edelbrock 2176 intake I am putting on this 360 changing it from a 2bbl. to 4 bbl. and this intake has none. Don't want to strip this 2bbl. intake because I will be selling it with the new Holley carb on it. Not sure they would come out anyway. Does anyone have these laying that would sell them. Thanks,Bill