Since I no longer use the email I had all my keys assigned to I decided it'd just be easier to buy a new key. However it was at stupid o'clock so I went the quickest route, through the old amazon account I last used to buy BL - not thinking that the account was tied to the same email address and not realising it hadn't asked for an email. Sure enough, there's now 5 keys sent to recovery instead of 4 to an email I can't access. I can PM the email address (and intended email address) as well as bank statement for the purchase or whatever else is needed.
Thanks for any help, sorry for being a dolt