I'm a bit intrigued as to why you want them, though.
Your losses are looking great. There's very little doubt in my mind that you're following the diet 100% to get losses like that - so why on earth would you want the additional expense of buying a pot of sticks just so that you can watch one turn pink? In fact, I'll just add that there are a few people here on the forum who've never seen a stick turn pink - but have very successfully lost shedloads of weight.
Sorry to rant - but the whole testing for ketones thing drives me nuts. Maybe in the very early stages of the diet, it's nice to know - but after that??
Ketosis keeps you from being too hungry on this diet - but it's the lack of calories that actually causes the weight loss. Being in ketosis doesn't accelerate weight loss on CD.