AP Pay Cycle payment creation process for multicurrency Vendor Payments.

Hi

We have a weekly pay cycle at a minimum which pays 'large' sums to various vendors in multiple currencies.  Some of these Vendors may even have multiple payments made to them in different currencies based upon the origination of the initial set of vouchers and our agreements.  Our Treasury people bid these 'payment amounts' out to various banks and then enter into fixed contracts.  We often have issues between the time from pay cycle payment selection to actual payment creation as 3 days or more may transpire before the contract is awarded.  Do others have a different process approach?  Would