Just an update. I received my glass tube for the AGA-T from IBTanked the other day and the quality and fit are great.
One thing to note is that the glass tube's wall is slightly thicker than the original, so the inner diameter is a bit less. This decreases the space you have to fit the wick through into the tank. I was running a fat wick with the default setup and wasn't able to fit it through. I just rolled a new slightly narrower wick and was back in business in no time. Great tube and only ten bucks. Thanks OCD.