Seriously Stu? You are now president of TCA, correct? 6464 and 9700 describe a style of rolling stock. The graphics have nothing to do with it. MTH, Williams, Atlas Industrial Rail, and K-Line have all produced traditional size Western Pacific Feather cars and none of them call them 6464.
No, I'm not president of TCA; I'm President-elect. Jim Potts is now president of TCA.
Since the graphics have nothing to do with it, and it's just the style of rolling stock (box car with full rivet detail and double metal door guides), then we'll have to add the below Strasburg boxcar to the list of 6464's, and lots of others.