I went with Lord p/no J-9613-40 for my -7 with an IO-360-M1B.
Search VAF for this p/no to find others that have also used it.
Have a look at the Piper PA-28-180/181's in the list here that also run Lyc (I))-360:
http://www.lord.com/Products-and-So...-Isolators-and-Mounts/Locate-a-LORD-Mount.xml
Glad to hear that Van's has finally decided to go with Lord mounts.
I purchased mine (J-9613-40) from Jeppesen in May 2010 for $106 ea plus $9 UPS. Who would have thought........