THE AUSTRIAN specialist Mondial (081-314 1181) is offering packages for runners who wish to take part in the Vienna Marathon on 10 April, a week before the London Marathon. A one-night package, with bed and breakfast at a three-star hotel, costs pounds 255 including return flight from Heathrow with Austrian Airlines. A three-night package, including a charter flight from Gatwick, costs pounds 279. The Marathon registration, which Mondial will process, costs pounds 25.