Not sure about others but I would suggest you to contact SW resellers in your area to help you out. Also check with local SW user groups as those are a great source of knowledge and infomation.
For most programs you can get at least 30-day trial, but it is impossible to evaluate a CAD software in 30-days.
If you can't find a on-line trial download, contact the VAR for your area as suggested.
Would you like for me to do the download search for you and post the urls?