Program to create IIF file to import invoices into quickbooks

I need a program that will take an asc file with invoice information and create an IIF file that can be imported into Quickbooks. I will give preference to bids using VB6 . . . but this is not a requirement. I have attached a sample of our current invoice export file, but I can alter it in any way needed (ie change delimiter, add fields, remove fields, change formatting of fields, remove headers, etc)