Stop in for a cup of coffee

K... so.. stupid question.. i need to make spacers for the long bolt on my alternator and will need to make one or 2 for my power steering pump.. I have been trying to find thick wall tubing with a 5/16 (might be 3/8) ID hole in the center... i think i am just search from wrong terms like "Hollow aluminum tubing" Anyone have the proper name to search for?
Try black iron pipe nipples. Just drill the inside to the size you need. Worked for me.