Heater matrix hoses part number/info?

Hello! 

I had the fun and games of replacing my heater matrix this snowy Saturday gone! It all went smoothly, however as a seasoned glutton for punishment I'm now thinking I need to replace the hoses. 

Does anyone know the part number, or indeed where I can find it? I've tried vagcat to no avail… Also, where can I get them, and is there anything else replacing whilst I'm there? 

Thanks! 

Is it 171 820 371B?

giv us ashout,..mite have sum good hoses,...so you still having heater troubles.