save yourself a couple of hundred on the install and do it yourself.. i did it myself, took a couple of hours and i kicked myself afterward realising how easy it was.
i presume youre putting it into the MZ21 yes?
Ill see if i can get back under the ECU and take some photos of where i soldered everything up and taped it down. So long as you restore the S-AFC to factory settings and just set it up for 6 Cyl, Karmann AFM and the Up Arrow you can run around normally until you get someone to properly tune it.