I also found this thread:
http://www.mychevysparkev.com/forum/vie ... 3&start=50
Unfortunately mitechman47 kind of disappeared after posting:
I installed/modified a Bilstein sport shock from the late model Chevy Cruise- this shock is shorter than the stock SparkEV but Its still too soft and not worth the money.
So I MAY be treading through familiar territory here but I have no idea which Bilstein model series he tried. The Bilstein Monotube series has always been stiff so I am guessing he tried their new Twin Tube nonsense they have been pushing lately. I'll order a Monotube model, tear the old one off, and do a stare and compare.
Bilstein 24-171687 B6
I know this is a different model number from my list above but it is listed for 2011 - 2013 Chevy Cruze which is about as close as I think I am going to get unless the new Bolt uses the same suspension. Looking into that as well.
Update: Order is in for the Bilstein shocks, should be delivered 8/4