Thanks Wokka!
The gold hardware is the Grover upgrade through Pitbull. It does weigh down the head a little (lot!).
The PVC sheeting is a bit thicker than a piece of paper. I bought it advertised on Ebay as "A4 Clear Self-Adhesive Sticker/ Label for LASER & INKJET Printer" though it didn't work in a laser printer. It has a peel off backing, leaving it as a clear sticker with whatever you printed on it. In my case I cut out the printing to make the stencil, then stuck it to the head.
After a quick string up, everything appears to line up, so I've clamped the neck to the body with a bit of PVA glue.