Ask the Chief Clerk, that is what he is employed for. I did get warrants when in a similar situation, but with downsizing and budget contstraints, I suspect you wont even get sympathy.
"Joint" custody should get you a FMQ/OMQ though, and unless the ex is a real b$%^, she should understand the need to provide an alternative secure home. This has got to be better than a Mess even when the kids are not there.
Happily, I am well down the road from where you are, and it gets a lot better. I now have to provide my son with "petrol money" for him to visit.