Degrading OpenSSL version on xampp to recreate Heartbleed

Question

I'm trying to recreate the heartbleed attack on a localhost apache server. I'm running xampp 1.8.3-2 on my ubuntu, and I want to degrade my OpenSSL version from 1.0.1e to 1.0.1b. I found out some info on the net on how to do this on windows, but nothing about linux - only how to update obviously. What are the files I need to replace, and where can I find the files for 1.0.1b?

Thanks In advance!