What the heck, I was still up anyway.
. Pulled the invoice and links to all the items I used are below. I tested them, so they should work. If not, let me know. The link for the gas spring takes you to the main page. You WILL need to pick what pound you want. I choose the 20lb. It was more than enough to easily lift and hold up the seat. I only used 1 spring for each seat.
With regards to the brackets, I used some wood screws I had in the garage. Don't remember the size, but it is always fun to hit the hardware store.
For those who never messed with these springs before, they come with threaded ball ends already on them. Just remove the little clip on each end of the spring, and the threaded ball will pop right out. Don't forget to put that clip back on once you do your final assembly. Don't want them to pop off and the seat to hit you in the head
Looks like I spent about $40 for the entire thing. Well worth it. Hope this helps. Take care,