If you weren't already set up with the Kubota quick attach I'd recommend the bradco compact tractor forks (skid steer quick hitch). Thier website is down right now, or I'd give you a link.
I use the Bradco compact tractor forks on my B3030 and I have been very happy with them. They are extremely well made. You would need a skid steer type q/a though to use them not the Kubota pin type.