Data recovery and computer forensics firm Ibas announced plans Monday to buy its main European competitor, UK-based Vogon International. The deal is based on an “earn-out” model, which specifies a minimum price of £4m ($7.5m) and a maximum of £9m ($17m). Vogon will continue as a separate firm until the end of the year, with the integration with Norway-based Ibas kicking off on 1 January 2006. Vogon is privately-owned, and all the shareholders in the UK company have accepted the deal. The acquisition is conditional on a financial due diligence report…