Thanks to the designer for the upload.
The original design can be found here : https://www.thingiverse.com/thing:2210380
I couldn't flip the main left file on my printer to get the right side. So with a bit of mucking around (as i have never used the software before) I managed to get it sorted in free cad.
Please Note: This is not 100% level (on the deck) as i could not figure it out. Hopefully this help someone else.