FIrstly I apologise for the tone in this thread, we are friendly and constructive and this is a forum rule which has clearly been broken here. I will be snipping a few posts from this thread as it is not the sort of thing I, nor our readers want to be reading.
The Toyota ECU's are hard to remap due to the way they are locked, most tuners over here use a piggy back ecu - as that is not an option to you can you replace the ECU internals or swap out the chip (I guess this is not really in the rules either)?
NB: Megasquirt and APexII are commonly used on Toyota blocks as replacement ECU's but others are available out there.
A bench flash is probably your only option but I don't know anyone who has the skill or know how to do this.
We have a specialist tuner as sponsor on here, so try John at JFA automotive, if anyone over here can help you it will be them. They might be able to setup a custom ECU for you to adjust the parameters you want. But you reallly need this done locally so it can be setup on a rolling road.
Also are you permitted to use a vernier pulley to adjust the cam timing? This might achieve a better peak power band for you.