you could do the entire shell in a FormLabs 3L printer (>$10,000).
There is a guy in the Netherlands that would print it but at a cost of 1Euro per ml plus VAT and shipping. So close to $500 (+ VAT and Shipping) for say two shells. If you want his name and email let me know.
Instead, for a large model I am building I split my model into 3 sections with interconnectors.