Hi,
My bad ; the plugin "productfiltervendor" does not have the good goal for your requirement.
The best is to create a new setting for the HikaShop product listing modules allowing HikaMarket to generate the vendor filter.
HikaMarket already add some settings in product listing modules, like "show sold by".
Please use the "contact us" form, with some indication for the HikaMarket license and we will send you a patched file for the plugin "hikashop / market" which will add that new setting.
That new setting will also be include in the next HikaMarket release.
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.