HERE'S a bunch of threads to start with. personally i like toe plates. they're symmetrical and not too much $$. shop around
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combined with a bubble gauge.
this one works good on mopar spindles
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and for turn plates i use two pieces of scrap plexiglass (per side) with some oil between them. like most people i don't have a perfectly flat place to do this, but i've found the flattest, levelest place i can in my garage. when i put the plates down i mark the outline in chalk in case they move. i'm able to slide under my car with it on the ground, and make adjustments so i don't need to worry about re-setting the car after jacking it up to adjust the upper arms. there's a lot more info but this stuff will get you started