It is very difficult to find current accurate prices for chemicals. There is a very good chance that you won't find the prices to the chemicals you need. You may just have to make the most of historical pricing or get very creative in contacting suppliers to get quotes.
Current pricing information is available for those in industry but are too expensive for us to maintain subscriptions. The following is some resources that we do have access to that you can make use to find pricing information.
Please note that laboratory chemical prices do not scale to bulk chemical pricing. That is, you cannot just multiply by scale and expect to get realistic pricing for 1 metric tonne.