Yes, Burgard Cycle makes 400EX/250R style Swingarm for the Z. The difference between the lonestar and Burgards is the Lonestar utilizes the suzuki Axle, hubs, and rotor hub, but the Price of the Swingarm and Carrier is $812.95.
The Burgard Swingarm is $450.00. You will need to buy the following Honda Parts. Axle, Hubs, Rotor hub, Sprocket, Carrier, and axle lock nut. These parts do add up though. But, honestly, I would replace the axle anyway, and I wanted an antifade rotor hub. So really all I needed extra was the hubs, caliper holder, and sprocket. The Rotor and Caliper are reused.
The total rear conversion cost:
450.00 Swingarm
150.00 double row Carrier
50.00 Rotor Hub & Lock Nut
70.00 Hubs (USED)
30.00 Caliper Holder and Clip
30.00 Sprocket
780.00 Total
The total is cheaper plus I have parts I could sell or keep for later.
You will also need a axle, but you wouldn't do the conversion and keep a stock axle even for the Lonestar. So, Plan on spending another $350.00 for an axle.
Burgard Cycle 717 225-6234