Faceted search Module [Free] and the Product Stock -filter

[LahtiTo]

Hello

I'm not sure if this is at the right place, but if not, moderator can feel free to move this to decent category. Also could not find the direct contact for the module developer, hence the forum post.

This filter is not working right is the shop allows backorders and you have combinations. If the out of stock product ordering is allowed, this filter acts strange. 

Let's say we have the situation where customer wants to filter and see all the M sized pants that have POSITIVE amount, this filter is useless as it only shows the products that the customer is able to order, no matter the stock amount.

What kind of a job it would be to change the logic that it would check the amount in stock of all the combinations and filter out the products not having size M in webshop's own stock?

I think the Amazzing filter Module has this kind of behaviour, so it is possible to build.