Thanks for the reply, Lois. I've also spent a fortune trying to find just the right one.
Do you have either of those shown by my links? I thought you were talking about the first link but you threw me when you mentioned mix of colors because I've only seen it with the white, although tubes of other colors can be purchased separately. The second one has a sharpener included, so my reference to sharpening.
Thanks,
Cathy