Bobcat attachments are the only odd-ball mini attachments that won't fit any other unit on the market.
Everyone else used the Toro Dingo Attachment plate and almost all rental houses will have attachments with this plate.
The top two mini skids on my list are the Vermeer S650TX/S800TX and the Ditch Witch SK650.
Also do a search in this forum on either machine, lots of arguments on which one is better.
I personally run an 04 S600TX gasser. Just enough power to do what I ask and the money I saved on a gasser allowed me to buy a back-hoe attachment for it.