What follows turned out to be a list of entirely unsuitable forks, but I’ve carried on with it – in case it saves you time if they come up in conversation down the thread:
ECR or Firestarter forks are obvious, as they have all the options, but at ~480mm, they are *way* too long (having just measured my Vaya’s forks at just over 400mm A-C). Fargo forks are similarly well drilled, and a bit shorter, but still too long (~460mm).
Salsa’s Marrakesh fork would appear to be the closest, it’s got all the mounting options, albeit slightly longer at 415mm A-C, but … I don’t think you can them (other than as [part of] a frameset).
🙄