welcome back to riding! I too got back into flat after a 22 year break (about 2 years ago). I also had to re-learn everything since everything has evolved since the early 90's
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I'll recommend what I run:
Brake: Odyssey Evo 2 brake (it comes with pads)
Brake Lever: Odyssey Monolever (I run the medium)
Cable: Slick cable
lube: Triflow. before you install the cable take the cable out of the housing and put some triflow on it. This helps keep that cable sliding nicely inside the housing
I'd also recommend getting the Evo2 brake parts kit. I didn't run 990's in the front back in the day and it took me a little bit to understand how to set them up (I stretched the springs too far when setting spring tension). Not a crucial purchase but might save you some wait time if you mess something up. It comes with a straddle wire. That's not used for the front brake if you're unsure... Oh yeah, if you get these brakes pay attention to what spring goes on what side (It says on the brakes arms though...).
hope that helps!
cheers