Mick,
I'm currently restoring a BSD and bought a cheap parts machine to "upgrade" with the better parts. I have been scanning all plastics and decals as I go. I do have some (not all) spare playfield plastics. Shoot me your email address. If you want I can take pictures of those two plastics so you can see the condition (not perfect I can assure you) and, I'll send you the scans.
Thanks,
Greg