Maybe there's a member directory you can be listed in, or you could be featured on their blog if you have something newsworthy to share.
For example, this blog post on the Mountain West Credit Union Association website links to chinese overseas asia database one of its members offering a scholarship:
finance backlinks
What if you are not a member of any trade associations?
In this case you have two options:
You can spend some money and join a few organizations. Or, you can start your own organization and list your company as a founding member.