HI Jane
You can get more information on keys from SAP Support Portal, on Keys page.
In particular for information on Sysam you should look for License Keys - SAP Sybase
You can access also Sysam software from SMP. You can download it from SAP Support Portal. Click on Installations and Upgrades, then "A-Z Index" and then "S". Click on SYSAM and then SySAM 2.3.
Hope this help
Veronique