Wanting To BUY!!!!!

I am helping my mom look for a companion for my Dapple Grey Quarter Horse mare, Misty. I've tried many websites but failed to find one thats fits our description. She must be broke, not green broke and must be able to be rode. She must be healthy too. So if anyone has amare that fits our description please message me or email me @ killermemory.***@outlook.com. My horse isnt used to being alone she was born on our old farm and has been with her mother and our gelding. But, we had to sell her mother and had to put down our gelding due to bad calcium build up on his knees.