I think it all depends on how you'll be using the table. My LR furniture flanks the coffee table on 3 sides, but I have it centered in front of the sofa, and it's scooted closer to the sofa than what your table is in the picture. Since you have an end table, both sofas don't have to have access to the table. I would get a rectangle table (not a narrow one) so you can have more foot traffic where the chairs are. Then center the table in front of the sofa which is used the most. Nice room! Love the light in there.

Don't go overboard with the acryllic. There is plenty of it already. Remember the purpose of a "coffee" table is a place to set down your coffee cup. Therefore, I think it should have more substance than acryllic so your room doesn't look like a show room for an acryllic manufacturer. I wouldn't mind if it matched the silver sofa table either. Center it with the FP, and draw the seating to it. I think once your seating is gathered around the coffee table, the navy bench will fit nicely at the window, behind the two chairs. Here's a run-down of what to think about when shopping (from Vern Yip of HGTV.) https://www.hgtv.com/design/decorating/design-101/10-tips-for-finding-the-perfect-coffee-table-pictures

Where could I find a large square coffee table similar to these?

The most similar one on Amazon I could find is this: https://amzn.to/3kACszk Right now, the price is marked down 35% which is great. I also found another one on Wayfair that's by Kelly Clarkson Home: https://www.wayfair.com/Kelly-Clarkson-Home--Scott-Coffee-Table-X114324731-L441-K~W003213620.html?refid=GX433511788781-W003213620&device=c&ptid=912962079783&network=g&targetid=aud-871659140096:pla-912962079783&channel=GooglePLA&ireid=109533495&fdid=1817&gclid=CjwKCAjw-5v7BRAmEiwAJ3DpuHims2pH8DY9yDse0vsAFdE1hvNdDEwFhVV-6vmkGbkVyBMh-umEzhoCGqQQAvD_BwE&experiencetype=1 Wayfair has some great tables - good luck! #affiliatelink