I want to purchase an air eliminator and install in at my water meter. Where would one order this product?

I'm curious why such a device would be needed ? Air in the incoming water should only happen on very rare occasions when the utility company has opened the line up-stream from your location...

I want to purchase an air eliminator and install in at my water meter.
I don't know if the even make such a fitting. As a rule we purge the line of air by opening the uppermost faucet and letting it run.
If you're getting bursts of air coming through your meter the first thing to do is call the Water Department and ask if work is being done in your area. If so it will stop as soon as the work's completed.
However, if iut continues I would install a expansion tank on the houise supply and see if that doesn't help. Good luck, Tom

To be effective with not counting air in water usage, it would have to go BEFORE the meter. Thus I would suspect that approved devices are required.

What kinds of problems are you experiencing?