When I bought my 1 oz travel refill of Back to Black, I purchased a 1 oz glass atomizer from ebay. Here is the listing: http://www.ebay.com/itm/ws/eBayISAPI...#ht_500wt_1182
The seller is awesome, I've done business with her before. The sprayer on the atomizer is okay, each spritz doesn't spray as much as I would like (it's not like the Creed sprayers). So I sometimes double the spritz to ensure I get enough juice on me. Overall I'm satisfied.
If you want an atomizer with a better sprayer, you should get the 50ml glass atomizer used in the Kron's Basenotes splits. You can find a picture of what I'm talking about here: http://img62.imageshack.us/img62/4836/creedend.jpg
I'm sure you can find it on ebay or an online site that sells atomizers.