I have no relationship with this supplier, but they can apparently make any custom equipment you want, and also do rigging for aerial equipment.
Stall bar pics: https://www.facebook.com/crunchtimeaerialequipment/posts/515334235256946
General information: http://www.crunchtimesolutions.com.au/riginformation.pdf
... in case anyone is interested. Just found this via the "Safety in Aerial Arts" Facebook group.