Ex mod registration issues.

Hi all
I know the process of registering ex mod with mod release documents but I purchased one from someone that lost all/any paper work, so I only have receipt of purchase!
I understand I need to contact ministry of Defence, so have sent some emails of weeks ago with no response.
Can anyone please help with the most recent contact details of ministry of Defence or email as not sure if I’m having no response due to being an old email address etc....... Anyone had any luck recently?
Thanks everyone

Join mvt and get their advice. Also get the b card from rlc

Military vehicle trust.

Royal logistics corp

Thanks wildefalcon