Does anyone know what bushes will fit both models?

Anyone who has been to the powerlex site will know that they seem
very confused as to where the X300/X308 demarcation points are.

They have two overlapping sections for these cars which does not inspire
a great deal of confidence when selecting parts:

Powerflex - Performance Polyurethane Bushes

Have you tried looking on the www.jaguarclassicparts.com website. This shows all the OEM part numbers, so that you can easily see which bushes are common between X300 and x308 and which are different. For instance the front top wishbone bus (CBC5523) is common to both X300 and X308. This is the bush which I have replaced with a custom made sealed phosphor bronze bearing in order to eliminate all non-rotational movement in the joint.

Perhaps a new marketable offering from Andy! Mmmm, non rotational. Tell us more.

Thanks, I have JEPC installed locally, and did find such things as CBC5523 being common.

However, I am more concerned about situations where the numbers are different, but in fact the parts fit.

What's availabilty on those bronze bushes, and are they harsh?

I can make more of my bushes to order, but I can only recommend them to owners who are prepared to trade off ride in pursuit of improved handling. The ride is definitely more harsh.

Ok, I'll bite .. how much?

And how about noise?