Back Door to suit Gottlieb Head Box

[pinballist]

Hey all, I thought I might as well put the request out there from now.

I'm looking for a Head Box rear door to suit my 1969 Gottlieb Skipper.  The machine did not come with a door which the seller conveniently forgot to mention in the ad but that's another story.  I don't know how standard these doors are across the different models and makes but the Head box's rear opening dimensions are:

705mm wide X 675mm height  X  20mm depth (bottom door channel)

Thanks again :)

[illawarra_steelers]

I may have one, will check tomorrow....if not just a sheet of ply cut to size will do the trick!

[ddstoys]

Ive used Ply in a few machines of mine and it stops a lot more of the noise than a standard steel door does

[pinballist]

Thanks boys, that sounds like the way to go.

[illawarra_steelers]

The only spare I have is 705mm x 645mm 

Not too sure what that is off?

[pinballist]

That's alright Tony, I'll just cut up a piece of ply to fit.

[millsy]

I found the plywood to warp,tried MDF -no problem.