SAP Expenses Automation

We presently have a paper based process for claiming expenses but are looking at entering claims (probably via intranet type front end), workflow for authorisation, through to automatic posting into SAP Travel Management expenses.

Does anyone do this either via a software front-end or using SAP who would be happy to discuss this with us?

At this stage we're only wanting details of potential software vendors (and how good they are and how well they link to SAP) or details of whats available in SAP (and whether we need to upgrade or buy an add-on).

We are using SAP version 4.7

Thank you