The former chief executive of Asian life insurance group AIA is seeking private equity backing to bid for non-core emerging markets businesses of FTSE 100-listed insurer Aviva, the Financial Times quotes people familiar with his plans as saying.Mark Wilson left AIA last year following Aviva's UK peer Prudential's failed attempt to buy AIA from its owner, the US insurance giant AIG. Aviva is considering selling its smaller eastern European and Asian businesses to focus on core markets.---RG