Transfer case differences & knobs

[1969 GMC]

Hello, my 1969 GMC has a Rockwell T-221 transfer married to an SM465, and the shifter is on the left side of the transmission shifter, makes a nice leg rest . But, I have heard that the more common NP205 shifter is on the right side of the transmission shifter. Do these transfer cases have the same shift pattern?
I think mine is:

2 Hi (dash)
|
4 Hi
|
Neutral
|
|
4 Lo (seat)


This is what is pictured in the owner's manual, but I have heard that both the 205 and the 221 were used in 69's. Is this the correct shift pattern? I am 100% sure that I have the Rockwell, I had to rebuild the front driveshaft and I took a peek at it.
Also, are replacement knobs available with the shift pattern on them? Mine is plain, with a slight bead or grip surface, going around the outer circumference.
Thanks, sorry for the long post.