Just an FYI, I ordered new bushings for my radius arms and I purchased them from JDHT. I can confirm that the OEM manufacturer for these rubber bushings is indeed Metalastik.

It was tough to find someone else who sold Metalastik branded bushings so I went with JDHT.

I try to shy away from aftermarket when I know the work will be tough to do. I don't want to mess around with these again in my future.

I did end up going cheapie aftermarket on the motor mounts. The OEM ones were 3 times as expensive, but they look pretty darn simple to change, so I decided to save the money here. They look like simple rubber donuts anyways.

 

I was advised to fit the bush with the gap at 90° to front to back axis for slightly firmer control of fore and aft movement.

 

Yep,

Metalastik is the OE, and that is all I use.

That fitment orientation does firm up the system just a tad.

 

Apparently Metalastik is a registered trademark of Trelleborg Industrial Anti Vibration Systems.

Possibly available from Metalastik Vibration Isolators | Metalastik | Product Lines

 

Prices don't look any cheaper than the dealership!

My radius arm bushing (large) is 13/1422 5
Small bushing is 13/1421

They don't seem to sell these particular ones. I doubt it would be cost effective to find out if they could get it.