I got a 99.5 PCM for my early 99 which I originally bought from DP-Tuner. It had a 80hp econo tune on it which ran like a raped ape. A big improvement was with the tranny operation. I was never happy with the shifting strategy of the early 99 OEM PCM tuning. The improvement was greatly appreciated and needed. Aside from the performance and shifting improvements, another difference was the cruise control indicator on the dash now worked.
As I felt the need to further feed my addiction more with things like single shot injectors and hotter tuning, I eventually got tuning from Power Hungry Performance on both the pcm and chip.
I'm pretty sure DP-Tuner can still set you up with a PCM with 99.5 tuning on it. Bill @ Power Hungry Performance might be able to help you out too.