Martin,
Rob is right (I bet he doesn’t hear that often!) – I’d check what system they’re using before you order the material as some Flexface systems require the edges of the skin to be hemmed to accept tensioning rods whereas others are just lapped back on themselves to accept the clips that hold the face in place (some of these systems will require a special tool to remove the clips too).
If it turns out to be a Universal system then Plastiweld would be the best bet for a competitively priced skin complete with hemming & printing. If it’s an Insight or Nova system then ESP would be worth a call.
If you can post a decent close up photograph on here it may be possible to identify the system.
Not trying to teach you to suck eggs but there are a number of pitfalls waiting for you if you’re not careful!
Guy