Cheap and light plus they work well. If you don't like em then you're only out $15-20 rather than $100 for a name brand with essentially no weight difference. I have em, used em, love em. They're in my pack year round.
Depending on what you're looking for, here's a few things I've gotten from Amazon over the years and have had good experiences with them:
Most of these are more luxury and lightweight than true ultralight - but these are some of the things I've gotten some enjoyment from. Your mileage may vary.
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Body Wrappers Ripstop Pants 3.7oz in LG
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I don't know how much there is to say about them, order a size up, I use them for wind pants and for sleeping.
the body wrappers ones on amazon that everyone raves about so frequently here.
I keep them handy in case members of a rival gang show up and we need to settle things with a dance off.
I picked up these: https://smile.amazon.com/gp/product/B0002UR7PY/
If you go shorts, then replace the hiking pants with some 3oz wind pants (I see you already removed the pants from the lighterpack)
https://www.amazon.com/gp/product/B0002UR7PY/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
These often get recommended as a cheap if not particularly durable option: https://www.amazon.com/dp/B0002UR7PY/ref=cm_sw_r_cp_api_EUEJzbATDTAMH