You can easily, it's available on Amazon and eBay.
You can find it locally often enough, too. Look for 'occult' or 'new age' shops and if they don't have it in, they may be able to get it in from a reputable source. There are at least two shops local to me I know of where I can buy multiple varieties (if they exist) of frankincense, myrrh, dragon's blood, copal, and almost any other I've looked for.
Also, from the bullet-pointed list of features:
- Smells like Church