Best price tire valves for carb caps

[mosquitocontrol]

Simple question. I want to make a bunch of carb caps maybe 10-20 for beer while camping. Went to auto parts store yesterday and only chrome valves I could find we're $7/pair. Looking at old posts I feel I should be able to get them cheaper than that.

Where's the best place I can buy or Oder a bunch of these. Looking for metal ones because the rubber ones touching beer scares me.

 

[mosquitocontrol]

Follow up to answer my own question and hopefully help some people out. All the auto parts stores were near 6$ for 2. Cheapest I found for chrome bolt in tire stem valves was eBay for $12.75/10. Pretty good if you're looking to make a bunch like I am.

http://www.ebay.com/itm/10-total-va...ries&hash=item19da9c5fd9&vxp=mtr#ht_499wt_671