Stress test for EAP-PEAP

Since I've been having great amounts of troubles with 1.1.2 / 1.1.3, (See SSL_read failed in a system call message) We're going to try building another server with 1.0.4 (The latest version that we have in production that works for us) Anyone know of a stress test utility that can simulate EAP-PEAP? In my test labs, everything works great. It's only when I load a few hundred to a thousand clients that things seem to break. I'd like to find out if this new server is going to have issues before I impact my clients