Hello Tessa, a hot welcome to you.
Unfortunatelly I was not able to find a catalogue to help you and 2000 cc are certainly custom made. But, with Dr Domanskis, by the works that we see, you are with one of the masters of real big boobs, so he is the guy to help you.
I think the "firm bolted on look from the start" will be a somatory of the thickness of the expander's shell, it filling amount and how thick and stretched is your skin. The surgeon is the correct person to talk about and help you to decide if go step to 2000 cc or not. Good luck.
And is very excting read a girl post that "I’m guessing I’ll be having them overfilled to 2000cc... and later on the sky is the limit. They’ll be able to get to 4000cc +"
Thanks for share with us.