Split the Payment amount per supplier

Hi,

I have a requirement to split the payment amounts if a payment exceeds 50000 $ per supplier.

For example I have two invoices one having 60000 $ and another 30000 $ per the same supplier and site. While paying to the supplier I want to split the payment into 50000 $ and 40000 $. Ultimate requirement is to restrict single payment (Cheque/EFT) to 50000 $.

Thanks,