Amber Room

from ohgo.sh:

• 1 shot Hendrick’s gin
• 1 shot Noilly Ambre
• 1/3 shot St. Germain Elderflower liqueur
• 2 dashes orange bitters

Shake and serve in a cocktail glass. Served with a lemon twist.

I haven't gotten to try this one. Noilly Ambre is ridiculously hard to find - any substitute suggestions? I came across this recipe looking for something with Hendrick's and Elderflower. It sounds tasty, but I can't vouch for it, not having the Noilly Ambre.