Hello,
I remember that I told you some time ago, in a private conversation, that it is not possible and that won't be possible.
A module display its content and you might have some "synchronize" option to link a module to the menu.
But what you're asking is to link a module to another module which is related to a menu ; but you also want that this last module be synchronize with the menu since you want to keep the vendor filters.
You can have a category listing module with "extra filters" but you can't have such modules imbrications.
The possible solutions are complicated and would require a very important development ; and since you can achieve similar things by just using category listing menu + product listing module (module which is directly included with the category listing menu) ; we do not recommend you to go in that complicated direction.
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.