There are no independent pro shops in Austin. The nearest shop that has an LV1 is Proshop Paintball in San Antonio. However, your best bet might be to head out to X-Factor Paintball Park. Some of the X-Factor guys have the LV1 and, if you ask nicely, I'm sure they'll be happy to let you shoot your own paint through it.
R.I.P. Sidney Ng |FHV|Jets