Another idea is to try to attend shidduch meetings, and present the men or women who you would like to help. Make sure you’ve asked them if they want you to do that. No shidduch meeting in your area? Organize one via your shul, community, whatever.
It’s a lot of word of mouth and keeping your ears open. No, I’m not A Shaddchun, but I am a woman who almost always is listening for possible matches for those I know.