Some of the colors you listed weren't orders from USPC - for example, I read this on the Playing Card Wiki:
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The Green, Orange, Gold, Silver, Turquoise and Fuschia Rider Back were produced by italian
Vincenzo Di Fatta, who also have produced a
Rainbow Rider Back.
The Yellow and Burgundy/Maroon Rider Backs were produced by the
Bond Agency.
The Brown Rider Backs were produced by
Brooke Michael's Pokerworld.
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However, it looks like some of these "custom order" colors are already being released in the new boxes, so anything's possible, I guess. Unless DiFatta is simply reordering his customs - all the new ones besides red and blue were originally produced by DiFatta.
USPC is still selling its Cincinnati stock of the Black Bikes - I've been getting them in a four-deck set from Walgreen's comprised of two Standard reds and two Poker blacks. The black deck is exclusive to that set - all the individual blacks selling out there came from those sets. It's kind of funny - the set sells for $12 unless it's on sale, and I usually see the Blacks selling for $5 or more...