I just got from Ebay a 1/48 scale Williams Bros Pitcairn PCA2 autogiro. This has been out of production for a bunch of years, but does look good for the vintage. My question is, are there any accessories available, such as for the cockpit, or even the engine? Also, the 'giro had support wires attached to the rotor blades. There was clear nylon thread supplied with the kit. In the general drawing that shows everything set up, there are turnbuckles midway down each wire. Is there any manufacturer which could help out with turnbuckles, or would I be on my own? I think I could do better than simply building straight out of the box, so I'm asking what I asked.

There's nothing specifically made for the Pitcairn, but you could use generic aircraft details for anything made in the 1930s. For the turnbuckles, you can borrow a WWI modelling technique. Stretch some styrene tube and wind some wire into little loops. Superglue the loops into either end of a piece of the stretched tube and you've got yourself a turnbuckle. You coud make your own, or buy them from Bob's Buckles.

Here's a walkaround of a preserved specimen. The cockpit looks pretty simple; you could probably make most of it from styrene rod and sheet. Here's a build of the kit. The text is in German, but it can be machine-translated easily enough.