Bad news on the RR-racing ones.. I just sent them an email yesterday about the progress... this was the response.. At least it look like there are a lot of other options.
Email:
"RR-Racing.com" <Rafi@RR-Racing.com> wrote:
> Well, I looked at those mounts, and there isn't much
> "meat" in them to
> insert anything... so it really wouldnt stiffen
> these mounts much. Send me
> your address again and I'll return them.
>
> Rafi