Its hard to tell exactly which coolant line support you need but all of the supports (and PN's) can be found in the diagram here:
http://www.a u t o a t l a n t a.com/porsche-parts/hardparts.php?dir=986-97-04§ion=105-10
Silly software. Copy the link above, paste into your browser, and manually remove the spaces in the URL.
Of course, once you have the PN, be sure to check with our forum owner, Pelican Parts, to see if they sell that part.