I am in a country where even orange bitters are impossible to get, let alone these Daiquiri bitters. There is a website which ostensibly sells them, but laws of the country state that no alcoholic product can be purchased unless through an approved liquor store. Keeping that in mind, how severely would the cocktail be affected if I omit these bitters? How does this work for other recipes with such bitters?
Sounds like you need to emigrate. The https://www.thewhiskyexchange.com/ stocks and if they ship to your country, all should be legal re duty, etc. Otherwise, I'd give this a try without. The quality of your falernum will have a more significant impact.
Finally got to try the drink. I do think the Daiquiri Bitters would have added something. It is really dry, and I think some simple syrup would significantly help it. It reads like a Christmas Daisy more than anything. Though this could also be due to my cranberry juice, which has less sugar added to it than others.