One person said she might know of one, and I messaged with her on Facebook a bit about the horse that night. But the next day, Shar texted me that she'd found me a horse! She'd messaged a few people about wanting to find me a horse, and a friend of hers has a horse that is currently just sitting around that she'd been thinking of selling or leasing. It's actually her husband's horse, but her husband isn't riding lately, so she'd been exercising her every week, and now that she (the owner) is injured, can't even do that. So she'd be willing to lease and/or sell her to me. Win/win/win! I get a horse to ride and a decently long trial period to decide if I'd like to buy her, the horse gets exercise, and the owner gets her off her hands for a bit, to a place she knows with someone she knows (even if I'm a friend-of-a-friend, the horse will be living at Shar's place).
So last Sunday, she brought Elk out to meet me, and me her. (Their family has a history of less-than-traditional horse names, especially for mares--they had a mare named Frank.) She's a mustang (can't see her brand because her mane hangs over it, but it's there), and she's BIG. Not super-tall, probably 15.3, but BIG bones. Which is good--she can carry me around.
Isn't she pretty? She was on a dry lot at her prior place, so even though this is not high-quality grazing, she was still in heaven. Plus, she's a mustang, so it's actually quite the smorgasbord for her, even if other horses would turn their noses up at it.