Q.looking for yew variety
I have two low growing (sheared) yews which never turn brown and I want to buy more to replace another variety of yew which is turning brown and dying. Can anyone tell me what the name of the variety is that I should look for?
All yews are evergreen and have the potential to turn brown if exposed to certain environmental conditions (harsh winter - winter burn, insect pests, etc.). There isn't a variety that would be resilient to that. You may not want to throw in the towel on that shrub of yours yet - it probably sustained some winter injury and there are things you can try to revive it, which are discussed in the following article:
https://www.gardeningknowhow.com/ornamental/shrubs/shgen/winter-damage-of-shrubs.htm
Here is an article that discusses the different Yew shrub types:
https://www.gardeningknowhow.com/ornamental/shrubs/yew/growing-yew-shrubs.htm