I think the resistors are 7ohm 10 watt wire wound ceramic resistors (I know the resisance is 7ohms I don't know if they are 10 or 17 watt resistors) from jaycar about $1.50 each and you need 6 of them. I'll find out tomorrow as the $100 pack I got from direct imports a few resistors died yesterday, I believe mainly due to poor construction as they were glued together and the ends covered with some sort of silicon and water may have got into the resistors ( I don't really know why they failed, all I know is they were wired up properly and it was running fine and now it isn't). A little metal box only costs a couple bucks and might be worth a go but the resistors may ge to hot.