Hello,
Thank you for your feedback.
Indeed now Hikashop add the backend edition page in the "product contact email" ; that part is directly processed in the contact preload and HikaMarket do not have a direct/simple access to give another URL.
Right now you can see to make an override in the HikaShop contact preload to not add the backend link when the product is assigned to a vendor
if($data->product->product_vendor_id > 1) { /* ... */ }
In the mean time, I will work on a patch in HikaMarket to re-generate the all block when the email template is processed.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.