Any of these will get you started.. (looks like they are in stock on the website)
http://www.red.com/store/products/redlink-development-kit
http://www.red.com/store/products/lemo-to-cat5e-ethernet-cable-9
http://www.red.com/store/products/4-pin-00-lemo-to-flying-lead (you'll need to attach your own DB-9 connector)
http://www.red.com/store/products/redlink-development-kit
http://www.red.com/store/products/lemo-to-cat5e-ethernet-cable-9
http://www.red.com/store/products/4-pin-00-lemo-to-flying-lead (you'll need to attach your own DB-9 connector)