Driven racing makes something that might work for you.
You could also try the tygon tubing and make your own hose.

Tygon 2375 Clear Brake Fluid Reservoir Hose 6mm and 8mm | Motomillion
This tubing is used for non-pressurized brake fluid connections, ie. connecting your remote fluid reservoir (brake or clutch) to your master cylinder or to delete the reservoir all together. Quantity of one (1) means you will receive 1 foot of (12 inches / 30cm) Tygon 2375 tubing. Please select...
