92 cabriolet ac condenser broken pls help!
 

I have a 92 cabriolet, and the ac hasn't worked in years. I finally paid to have it converted to the new system but then when they ran the dye through, it shows the condenser is leaking. I saw that i can get the part on line for $144, but is it a big job to install? My dealer is great but they want over $800 to do it and I can't afford it!
Thanks for your help.