mcguinn farms is a website that makes vertical trunks that are awesome. you can put your saddle and bridles on the inside and lock it which is really nice. they also have wheels and are super easy to move.
If you don't want to spend a lot on a good quality I would go to a local hardware store and get a Stanley
I use a Stanley trunck and its great!
I like the blackberry hallow they are hand made and you can get them customised and your can all types of tackTRUNCKS
if its a tack TRUNCK i would get a stanley box