Most avian vets will let you arrange a phone consult with pictures you can email, or even skype. Then they can advise a general vet if further action is necessary.
I wouldn't mess around with that, if its some sort of fast growing benign tumor it will impede breathing & lead to obvious further problems fast.
It may even the result of a virus causing a growth similar to a wart?
I live in a regional area & have the exact same issue as you in not having relative access to an avain vet, and I do the phone consult thing fairly often.
Especially at the moment as I have an unwell Tiel
Dont let what may be a small problem now, become a bigger one...
Hope you find answers soon!
I actually live in Australia, so the Vets I use would be a little far away for you
But I am sure if you google Avian Vets nearer you location & give them a call you will soon find one happy to do a phone/skype consult for you.
Then you can get some dialog going between them and a close by general vet to do any necessary procedures.
Most Avian Vets are very understanding of regional people needing help for their birds, and will get the ball rolling to have you & your bird sorted.
And thankyou...my Tiel is in for a bit of a difficult time...he has serious diabetes & we are sorting out the best treatment plan to hopefully get him back on track.