If they are not available the best thing to do would be to design a basic device page purely for the IR Codes - one for the Amp one for the DVD (i.e. so no flash lay out just basic uniform 'buttons' for each button on the remotes - design this in Prontoedit).
Then upload this ccf to your Pronto and then learn each of the codes - this is actually quite quick. I would recommend that when learning you always do 2 quick presses of the original remote command as the Pronto 'tends' to learn the codes better that way.
Then you can test the codes using the Pronto - if they all work go back to the PC download the config back to your PC and hey presto! you now have 2 device pages with the full codes for both DVD and Amp. You can copy and paste each of these individually into a new CCF and save them separately. Then be a kind soul and upload them to www.remotecentral.com so that others don't have to feel your pain
What I then do is create a nice looking device page with only the remote functions that I regularly use but have the basic layout device page with all the codes as a hidden page. All the buttons on the nice looking layout are then just aliased to the actual codes on the hidden page.