Don't know where you live so can't tell you where to buy hose from. Suggest you pick up phone and phone your local washing machine shop. You will not be able to buy just a drain hose. F&P smartdrive drain hoses come complete with wiring harness & all plastic clips from top down to motor. Expensive and difficult to replace. Your local appliance service company may have a good 2nd hand hose only. I would just repair your old one. Most of the time it is just a small hole which can be filled with black silicone then wrapped with rubber repair tape for hose repair. Any good hardware store should have both.
Lincoln Appliance NZ
July 2012
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix washing machines.