That helps a lot more. Lets work off of the figure below.
So to reiterate, the pin passed through the drivers, but got hung up on the driver side active spacer. However, upon disassembly, you removed the passenger side half shaft and are attempting to remove that side.
So you're saying that the active spacer on the passenger side will now not come out of the coupler. Does this mean that the passenger side-driver will disengage from the coupler, but the active spacer seems to stay meshed with the coupler? Or is there just not enough room to remove the driver and active spacer from the coupler because the driver side gears are in a disengaged state?
As I recall, its hard to see what is going on down in the carrier when its in this state. I also don't recall - can you remove the C clip from the driver side at this point? or are the ring gear teeth in the way? If you can just pull the carrier out at this point, that may be a good option for you to at least get the diff out on a bench and work on it that way. Sometimes just getting more hands on it and a new perspective is all that is required to get it fixed. My guess is that the tight bore between the active spacer and the coupler is what is hanging you up, and if you could work it back and forth from two sides, you might be able to free it up. Looking forward to the pics.