I have a client running SQL Anywhere 5.5 on the back-end, with a
PowerBuilder 6.0 application on the front-end. I realize these are
VERY OLD versions of software, but they are very happy with what they
have and do not wish to upgrade. However, they would like to add more
users. Right now, they have a 5-user license for SQL Anywhere. So,
my question is . . . is it still possible to get additional licenses?
From an old post on this site, I found the following part numbers for
the version 5.x additional concurrent licence kits:

1-user #17581
5-user #17582
20-user #17583

Are these still available for purchase? If so, who would I contact to
do so?

Thank you for your time. Any information you can provide will be
greatly appreciated!