Lol, hopefully I'll stop posting in this thread soon or i'll go broke.
Thanks to the folks over in the Attachments forum for encouraging me to take an hour drive to look at it, I picked up a used Frontier hydraulic box blade last night for $450.
It's a beast. It's 6' wide, and if i have the right model, weighs a bit over 800lbs and holds almost a full yard of material (24cu ft). Pulls great with the CT235, cuts great, has a nice sloping hinged rear blade, and hydraulic actuator for the scarifiers. (Won't set the depth, just 'on/off').
I think I'm going to stow the hydraulics and build a simple handle for it instead. The remote i have is accounted for and the hoses just get in the way. May also add some material to the side plates at some point, they have eroded a bit and may start to spill. (I'm also thinking about making some removable runners to act like gauge wheels and help level over pot holes)
And last but not least...
paint it.