Re:
I've investigated something similar fairly recently. My conclusion was:
Vernon will do an agricultural job which may or may not stand the test of time.
Enigma are equipped to do a proper repair.
In my case I have a possible crack in a drive side chain stay. Vernons approach to fixing it was a big was weld that in their words would not be pretty but should work. The enigma approach was to replace both stays and anything else as needed.
Of course there was a huge price difference, so much so that I could (and did) buy a second hand ti frame much cheaper than the enigma repair quote.
I may still get my frame repaired but I'd rather know it will be fixed than potentially fail again.
I did contact some local (to me) companies too, but none were interestwd enough to even reply.
If your frame is worth saving, enigma is probably the best place I've found to get a repair, but at a cost you may find uneconomical. To their credit they also offered me a discount on a selection of their own frames but I couldn't justify spending so much at the time.
I hope you find a solution. Good luck.