Earlier in the thred I reported 253.200 and 253.700 as active VT ANG A-A frequencies, turns out these transmissions were some sort of intermod interference with the SDR and not actually being used.
Here's a re-cap of current VT ANG A-A frequencies that I have heard being used in Viper, and as far as I've been able to tell the associated AUX channel number. No guarantees with the AUX numbers but fairly high confidence.
226.300 = AUX 13 Viper Common A-A
226.800 = AUX 18 A-A
234.800 = AUX 17 A-A
261.800 = possibly AUX 14 or 15 ? A-A
314.400 = AUX 16 A-A
349.700 = AUX 19 A-A
I'm not a member of SNE so if anyone wants to submit them feel free.