Cat Cues
I've only got two at the moment that are wrapped.
The first one is just slightly heavier (20.2 oz.) than your desired specs. Asking $400
The second is just slightly lighter (18.5 oz.) and slightly less expensive. Asking $300.
The weight bolt could be changed to get either one to your desired range. However, I build all my cues as close as I can to 18 1/2" balance from the butt cap. This gives what I think is the best "feel" and, if I change it, it's not really a Cat Cue.
I've always felt that the balance is more important than a slight difference in weight.
If either one appeals to you, but you don't like the way it plays, you can always take advantage of my money back guarantee. Alternatively, you could always have a local repairman make the weight change.
I also have a number of wrapless cues if a wrap is not a deal-breaker. I should have something that fits your weight specs exactly. Let me know if you're interested.
http://forums.azbilliards.com/showthread.php?t=327625
http://forums.azbilliards.com/showthread.php?t=240834