You could make your own juices with PG/nic and flavoring. Ask OneStopDIYShop.com - they should know if any of the flavoring come in VG instead PG. And they sell DIY kits.
And you can ask real juice vendors who offer PG juices and who mix the juice themselves whether there is any VG in their 100% PG flavors.
Ask FreedomSmokeUSA, Gourmet Vapor, Velvet Vapors, Juicy Vapor, Tasty Vapor etc etc etc - any place that makes their own juices and offers 100% PG as a choice. (note - FSUSA only offers PG/VG choices on many but not all of their normal sizes bottles, and no choice of mix on samples - I think those are 50/50)