No real suggestions on mappers.
The only other guy I know that maps the pfc is Lyndon (ex rogue) apart from Ryan.
At the time when I bought mine a map was £650 ish and no one had been trading long enough to get a any confidence on their abilities hence I thought buying all the kit and self mapping was best.
I kind of lucked in that I exchanged services with a company who had a dyno dynamics set of rollers so I got a whole day on the rollers and basic teaching. ( this was after about 200 hours road mapping!).
On the rollers we moved the dunk to each load cell upto about 0.8 bar and the Did a series of sweeps at higher boost load cells. This took around 6-8 hours on the dyno and a whole tank of fuel!
There were still areas of the map that needed tweaking on the road and even subsequently some idle/fuel cut decel adjustments needed to be made to get a smooth car in traffic. I gained no more power from the dyno mapping but gained a whole heap of safety. On the dyno you can see the effect of an extra 1-2 degrees of timing, no real gain sometimes and no point adding it! You can't do this road mapping.
IMHO find someone who will teach you the basics and do it yourself. Read plenty of books before hand and invest in some decent mapping kit. You now have wideband, datalogit and fpr so you only need a decent set of det cans/knock detection and away you go.
Have a look at efi101 and see if they are running a learn how to map day soon if you have no intelligent friends
The first stage is to get the car safe, logging if afr and knock to ensure they are sensible. You the. Have some time to learn and keep an eye on things. Once you know the basics you can identify when/how an issue is occurring and act on it.
First stage is read the "mr telephone" books, corky bottom books and learn some basics of engine combustion dynamics. Learn equations relating to afr in relation to boost levels and rpm. Learn about cylinder pressure and how torque is produced and the peak/area under the curve pressures. Have a bash at relating piston speed/rpm in relation to flame front speeds ( only to get an idea of the effect on timing through the rev range). Learn how the engine is more efficient at certain load/rpm areas ( peak torque area) and the effect on not only injector squirt time but also injector duty cycle.
Once you understand the basics you can start to apply some tweaks.