I have GT3 seat tall boy brackets for sale... R-9080(1) they will require the floor brackets to work... aren't selling those... these brackets are the side mounts for GT3 seats when you need to floor mount the seats to get extra headroom...
http://www.bkauto.com/porsche/r9080.php
Also have the BK harness mounts for both the outer and tunnel sides (R-9001 and R-9003) The brackets are unused and the mounts have been used, but are in good condition... they come with all hardware as well. These allow you to mount five or six points harnesses into the stock mounting points (tunnel side-the seat belt buckle point out side-the selt belt mounting point)
http://www.bkauto.com/porsche/harness_installation_hardware_porsche.php
Trying to get $125 for the R-9080(1) brackets and $100 for the mounts together...
they retail for much more... (150 for the belt mounts and 200+ for the seat brackets)