Well, here's what a couple of our recent washouts did. They got dropped out of PTO (our version of FTO) for some of the reasons you were dropped among others.
They got hired by a local college PD, pretty small campus, but they're cops. I know at least one of them plans on putting a couple years in, then trying to apply with other PDs/SOs. Whether or not he gets hired, I guess that's all in how much he improves with the experience at the school. He may not get hired, and spend his career where he is. But it may work.
Honestly, you may want to look at the same track. Once you're labeled as "useless" by a department, you are not going to get jobs at the departments everyone wants to work at. You're going to have to have some proof that you're not the same guy who got dropped. The only real way to do that is to apply to those departments that don't pay as well, or are tiny and don't get a lot of applicants. If you get hired (still a long shot), put in some years doing stellar work, then you may get another look by a "choice" department.
Pittsburgh Pirates- 1st place NL Central 7/15/11
They've got us surrounded? Good. Now we can fire in any direction, those bastards wont get away this time
An amateur will train until they get it right. A professional will train until they can't get it wrong.