I'm a fan of the Vaultz products.
The Vaultz Locking Field Pouch, Large - Black (VZ00740) is my favorite; I use one for each jurisdiction in which I am commissioned, the pouch has a combination have room for stamp, seal, pens, journal and everything.. They're a little hard to find in black these idays, but is availale in other colors and patterns. One place that claims to have the product in stock is acedepot.com.
Another option is the Vaultz Locking Storage Clipboard Black (VZ01230), which can hold most notary materials, all in one place.
Both products can be had for about $28, and can be found by googling the product name.
Both can be purchased at most major retailers/e-tailers