Hello . .
In woocommerce, we could actually control ( this including remove, add, and editing ) all email by developing our own add-on.
This would be quite simple, if you are using wholesale plugin, we just need to add another email that injected to order's emails and disabling regular one in case we detect that user is wholesale customer.
I could develop a plugin for this, estimation would be around 3 days of initial delivery. Final form would be a installable plugin.
Please let me know what you think
Thank you