I have one of the Prima ones fitted on the 172 Cup, you can have a look if you want on Sat when I collect the Cat and see if it's not to solid for what you want, they are worth every penny but you may get a little vibration/drumming from it as they are a Group N type rubber.If you run the vibratechnics engine mounts from K-Tec then you won't notice.
Regards Russ.......