You only need one, the flywheel lock tool
if You really feel the need you can also buy the pin spanner for the balance pulleys
Before I give you some part numbers, is it manual or auto
Pin spanner, only need the cog removal side, cam belt tension is auto on the 968
http://www.arnnworx.com/catalog/index.ph...Ln6Y6hKg-U
If you cant find a slim 27mm spanner,
http://www.arnnworx.com/catalog/index.ph...Ln6vqhKg-U
Porsche Tools
00072191710 Rear Spring Plate tool
00072192000 Balance shaft tool
00072192621 Oil Pressure relief valve tool
00072192061 Flywheel lock tool
about £35 in the UK, but $150 in the USA from the parts places, but $111 from Porsche direct
The manual has all the details of what tools you need for which operation
http://pdlibrary.co.uk/Manuals.php