If there is a local online bulletin board or online social group, post it for free.
Contact a local gardening group for use in their garden.
Contact a local gardening store, not one of the big ones, but a small nursery. They tend to be a source of neighborhood knowlege about composters or gardeners.
Personally I have a large compost pile that I just keep adding to over the year. I put in all my appropriate kitchen scraps that do not go to the chickens or the geese, leaves, flower trimming, and yes poop. I keep it moist and cover with tarps or large plastic sheets.
It can initially smell somewhat depending on how hot the mixture gets, but that subsides in a few days.
In the fall, I start a new pile near the original and start adding my fall cleanup items that are appropriate, laying the new with some of the old composted pile. Then I let the original pile completely compost and put in my garden beds, or trees, etc.
I also keep my worms in my compost pile which can be a terrific addition as long as the pile is not too hot. My worms will go to the bottom of the pile or wherever it is comfortable for them. Always a nice suprise to find them in the fall!
Sounds like a nursery or garden club is your best bet. You may make some new chicken friends!