citrix Server for NT/2000

where can I download citrix Server for NT or 2000. We plan to buy it, but want to test it first. I tried the site citrix.com & others but could not find the sw, i found Client ICA etc. OR anyone has it can put it on their fTP Servers 7 i’ll downloadit from them.
Regards,
akash (akashdeep_b@yahoo.com)