I don't know if they'd be able to help directly Sander, but you could try the BBMF. They used to obtain various spares, some from recovered wrecks etc, in the hope of obtaining a usable part. It may be they might have what is needed, or can point you in the right direction. I once got a prop blade from them, for use in the construction of a memorial, which was no use for a flying restoration but ideal for the required purposes. Maybe a letter, rather than a 'phone call or e-mail, might get somewhere?