Need a simple shop plugin that works alongside a blog.

I’m putting together a site for a customer and they have asked me to see about putting a small shop into it. I need something simple HOWEVER the plugins I looked at so far all seem to use a similar format in that they create products using the blog posts. My customer needs to have a blog also on the same site so how can I separate the two? BTW I’m also using SNAP to auto post to social media so don’t want the products created and posted through that also..

I initially looked at running Zencart on the same domain and this will work but the amount of additional work involved makes it a massive task and my end user will not have the savvy to use it themselves.

I reckon there is a simple obvious answer but i’m not seeing it!