Don't get an adjustable, it simply doesn't make sense. Any brand that is a perfect fit.
And yes you can make your own, just be sure not to preload the suspension. Basically you dont want any tension in the bar, you just want it to hold the chassis firmly in place. Hold the state that it is in when sitting on level ground.
The best way is the make the donuts, bolt them on, then lay the bar on top and weld it down. If you pre fab one and then fit it, its very likely that you'll preload the suspension. A good idea is to use two bars parallel to each other. Another possibility is to make a triangulating bar that attaches to the firewall.
EDIT: I didn't see the second page.
"1.)You have your vehicle lowered more than 1"
2.)You have sport springs or shocks
3.)have a tire profile of 45 or below "
wrong wrong wrong
"its more bling bling than anything"
wrong
"the civic is a stout car"
wrong
"I guess theres quite a bit of rear tug on the EG chassis"
nope
"i would get sway bars before I got strut braces"
I wouldn't. They do two completely different things by the way.
(sorry for my method of quoting I'm trying to save time here)
Front and rear strut braces are the first mod I would recommend to the suspension on a Civic. The springs are pretty good for a stock car, especially the 88-91 Civics, yet there is still a lot of body roll. Because like all FWD cars the Civic has a lightweight flexy chassis. Any mod you do to your Civic is going to have distorted effects because overall, the flexible chassis is acting like one big loose spring.
If you didn't feel any difference adding a front strut brace, I bet you felt your car actually get worse but didn't want to admit it. This is because adding only a front brace increased understeer. Adding the rear bar alone would decrease understeer, but make the car unbalanced, a little unpredictable or "nervous".
Sorry if I sound harsh here, I don't mean anything personal to anyone and I dont want to make any enemies. I just get frustrated reading over so many posts saying stuff like "an intake is just hype, strut braces are just rice" and I wonder whether the people that make those statements got bad information or are just not very in tuned with their car. My recommendation: if you have more than one 10 inch sub or larger sub in your trunk, then don't get a strut brace/intake etc other than for show. Those kind of mods to not match your priorities and you will not be happy with them other than by their appearance.
Actually I don't want to sound like I'm saying "there are two types of tuners, the 10inch sub and below type, and the 12 inch x 2 and above type" ha ha. But you get the picture.