sparco custom floor mounts?

Just wondering if anyone out there has the sparco seats in their 5 gen civic and knows how the mountings are fitted?

For those who notice the floor mounting area for the 5 gen seats, it is not flat and the mounting holes for the front bolts are not going down straight from the top.

I know sparco makes custom floor mounts for the 5 gen, but I was wondering if the custom mounts has the sliders on them already?

I have already got the side mounts and sliders and I assume the side mounts are sitting on top of the sliders and all together on top of the custom floor mount right?

My question is will I have to order the custom floor mounts on top of what I have already (side mounts and sliders)? Or is there another way I can install the seats?

Also if anyone has a link for the sparco custom floor mount for a good price will be great.

thanks in advance