OEM style wire strap - print using TPU
Nipple mount for zip ties - print using a hard plastic, do not use PLA. Us this to mount to the nipple mount points around the engine bay, then use your own zip tie to strap things in.

Want to print it professionally, us Shapeways: https://www.shapeways.com/product/DHEFHVXZG/firewall-zip-tie-grommet-for-vws?optionId=297776347&li=shops

Find more cool creations on my Scirocco Printed Parts Page
https://www.facebook.com/profile.php?id=100057386022095

It took considerable effort to create all of the models I have made for our community. Please consider donating to support my VW habit. Friends and Family PayPal https://paypal.me/LawrenceBoehm