This might already be an option, it is listed under integrations in the settings menu rather than couriers.

Do you use any integrations or just only my post and fulfill order details another way?

(I am not an employee, just a Eparcel user.)

This is an important feature and something starshipit should prioritise actioning, especially given the fact that in the background AP is currently working on merging the MyPost and Eparcel services into a hybrid offering

Yes please