XWS is only sold through Xerox or Partner channels. It is not sold on-line. Trials should be available through the same channels. Use this link:
https://www.office.xerox.com/en-us/software-solutions/xerox-workplace-suite#Resources
And select the "Contact Us" button.
You can also call:
1-800-275-9376 ext. 738
Hours: M-F, 8am-7pm ET