Emailed whiteline, here is what they said,
"Thank you for your inquiry!
The trans mount insert for the S197 chassis Mustangs is still currently under development.
The final product should be released in the next few months, but we have no firm release date at this time.
Follow us on Facebook and stay tuned to our website for any upcoming information!
Thanks you again for the inquiry, and thanks for your continued support of the Whiteline brand!
Best Regards,
Jan Pasia
Technical Service Coordinator
Redranger USA/ Whiteline USA"
Kinda interested in this now...
good work. since whiteline are Aussies, I read that email as if Lee from Hall Pass was reading it to me.