Well we took her back to the first vet. She said they didn't have the experience to attempt an extraction confidently, gave me a recommendation of two other vets who specialise, and didn't charge me for the visit. She was lovely and told me to keep in touch and let her know how it went.
Took my girl to another clinic, the vet on that day wanted to get her into surgery right away, while she was still so healthy. She said to bring her back in the morning so she could spend all day there. The next day I had work, so I brought her in the day after. There was a different vet on that day, he took one look at her and said he could extract it easily, no surgery needed! Lucky! An hour later the egg was out and she was ready to bring home!
So instead of costing me $2k and having her reproductive tract taken out in surgery, It cost $500 all up with a perfectly happy and healthy snake
Now I know, ALWAYS GET A SECOND OPINION!
Thank you everyone for your recommendations and advice xxx