QA1 LCA has no bumper

Do you have a part number suggestion for the taller upper bump stop?

Yup, this is what I use

https://m.summitracing.com/parts/ens-9-9136g

Works pretty well, good height too. I actually run an 1/8" spacer under mine, but, I sit pretty low and run 1.12" bars. I still have almost 6" of travel at the wheel from bumpstop to bumpstop, it's just the travel is recentered around a lower ride height.