Bucket Seat question

[JCD]

I have a question about Blazer bucket seats..
I recently found bucket seats from a 71 Blazer on craigslist.
They came with the original floor mount brackets, which is a plus.

As you can see in the photo, the original lever is there that disengages and holds down what I assume to be the passenger side seat..

I'd like to put them into a 72 Pickup, but what I don't have is the floor bracket that holds them down.. making for a really dangerous passenger seat in any accident..

My question is.. will the driver side bracket work for the passenger side as well, or is it an altogether different bracket for the pick up alone?

Do the parts suppliers sell these brackets?
Or will I have to try and find them for sale?

Maybe I'll be lucky and someone out there with a blazer will have pick up brackets.. lol

Are there any pages for creating your own brackets?
and one final question.. are the brackets in a pick up mirrored to each other left to right