Reliance power-owned Sasan Power may have tied up Rs 14,550 crore of rupee loans from a clutch of banks led by the State Bank of India (SBI) to achieve financial closure of the 4,000- MW ultra mega power project (UMPP) at Sasan in Madhya Pradesh, but the company is already scouting for foreign funds to replace at least 50 per cent of the debt at the earliest.