Here's an arm which was custom made in 2016 by me.
It's a 9" chrome and satin aluminium model based on the RP1-CR style, and . I have some pictures from when it was being packed to send to the owner:
There were very few like this. Actually fewer than the Gold Signatures.
The pic below shows it in the process of being packed in its box.
There is a post I blogged here