The TSC stores around me only sell Feed Grade PG, no USP. All the Orschelns and Atwoods I've tried don't carry PG at all. None of the feed mills carried it. Large animal vets were all feed grade. VG I could get just about anywhere. Wal-Mart, any health food store.
I got irritated Saturday and tired of looking so while I was out shopping anyway, I asked at any pharmacy I was by. Walgreen's pharmacist was rude. Target's pharmacist didn't have any but was very helpful. He told me any compound pharmacy (pharmacy that actually mixes scripts) should either have or be able to order for me and listed some nearby ones for me.
After explaining to the nice concerned older lady that owned the compound pharmacy that I wanted it as a base for vaporizer fluid and her checking that it was not some kind of illicit controlled substance, she agreed to order it for me. Should be in some time today. She said it's a next day thing. 16oz, so about 473ml for $10-$12. More expensive than by the gallon, but no shipping and I know it's USP grade.
She also sent me to a old time candy shop a few doors down and the nice gentleman there found a B&M store that carries Lorann's for me. HTH