Hi Vilas:
There is an RFP Hub at the Sourcing Community. While I didn't see a template the reflects the commodities you listed, you may want to check it out to see if you find something useful.
Here's the link: http://exchange.ariba.com/community/solutions/sourcing/tags#/?page=2&recursive=false&tags=rfp_template
Debbie Curtis-Magley
Ariba Exchange Community Manager