You can purchase cocktail recipe books online or bought at some local book stores. There are also apps on cellular devices that can be downloaded as well as many, many websites online that offer cocktail recipes.
Shrimp cocktail recipes can be found in most good recipe books. In addition websites such as simplyrecipes or foodnetwork have a variety of recipes to choose from.
A suitable substitute for gin in a cocktail recipe is vodka.
the cocktail with this recipe is called an earthquake.
A good substitute for Cointreau in a cocktail recipe is triple sec, which is a similar orange-flavored liqueur.
A suitable substitute for demerara syrup in a cocktail recipe is simple syrup or maple syrup.
A recipe for Spaetzle can be found online on many of the recipe websites. It can also be found in recipe books that specialize in traditional German cooking.
You can substitute regular vodka with a splash of vanilla extract in a cocktail recipe if you don't have vanilla vodka.
I found a few recipes: London Fog Cocktail 1 1/2 ounces gin 1/4 Pernod Frapp
Some good shrimp cocktail sauce recipes can be found at the Wisegreek website and Shockingly Delicious website. Both website contain a lot of shrimp cocktail sauce recipes for home use.
You can use fresh cherries, dried cherries, or cherry liqueur as substitutes for maraschino cherries in your cocktail recipe.
A good substitute for tequila in a margarita cocktail recipe is mezcal, which is a similar spirit made from agave plants.
A good substitute for vanilla vodka in a cocktail recipe is regular vodka mixed with a small amount of vanilla extract.