HVAC Blower Motor Resistor

[hawken89]

Hi there. I am a novice so take it easy on me guys!

I have a 2001 Land Rover Disco 2 w no AC or heat. Initially the first three speeds went out now everything is out. After much poking around I am fairly certain I can get the first 3 speeds going by replacing the blower motor resistor. When I look up the part I see the top resistor. But when I pulled mine out it was the bottom resistor. I can't find the bottom one and as you can see it is much more expensive than the top one. Are these parts interchangeable??

Thanks all!