January 24 (SeeNews) - Slovenian lenders Abanka Vipa [LJE: ABKN] and Nova Ljubljanska Banka are putting up for sale a combined 25.76% stake in Croatian plastic goods producer AD Plastik [ZSE:ADPL-R-A], Zagreb-based brokerage Fima Vrijednosnice, which is in charge of the process, said on Monday.