There's a Chemists' Own for that

Chemists’ Own^® Decongestant Nasal Spray 18mL

Relief of nasal and sinus congestion of colds, flu, sinusitis, hayfever and allergies.

Alternative to Dimetapp® 12 Hour Spray.

Nasal and sinus congestion associated with:

Oxymetazoline Hydrochloride 500 mcg/mL

Adults and children over 6 years of age: 1 – 2 sprays in each nostril 2 to 3 times a day.

Use in children 6 to 11 years only on the advice of a doctor, pharmacist or nurse practitioner. Do not use in children aged less than 6 years.

How to use the Spray:

Remove protective cap.
Before using for the first time prime the pump by depressing plunger once or twice.
Hold pump bottle at the base using the thumb.
Place nozzle below first two fingers.
Press down, steadily and evenly to the full length of stroke, while inhaling evenly and deeply.