I may have 1 extra but will have to check, I know I am 1 - yellow $20 short in my rack also... bummer.
(I think the $100 extra is taking up the spot in the $20 rack come to think of it... man I hate a 99 chip rack, so if you find 5 and really need the single I will give it up, but prefer to hold on until I find a $20)