I've tried a few more small components.
Red annodized QR skewers:
https://www.aliexpress.com/item/New-Pro-Road-MTB-Bike-Bicycle-Hubs-Quick-Release-Cycling-Bike-Quick-Release-Axle-Skewers-Seat/32458095975.html - These are pretty meh. The axle is semi rough, like it was made from cheap aluminum, and the screw is made of plastic. I would not recommend these.
Wire end caps:
https://www.aliexpress.com/item/30Pcs-Bike-Bicycle-Brake-Shifter-Derailleur-Inner-Cable-Wire-End-Cap-Crimps-free-shipping/32598865290.html - Can't really go wrong here. They work just fine.
Chainstag protector:
https://www.aliexpress.com/item/Cycling-Frame-Chain-stay-Protector-Guard-chain-protector-Bike-Sport-Tool-Parts-Road-Bicycle-Chain-Protector/32228731365.html - Not bad. It's a padded fabric material, so I'm curious to see how it does when it gets wet. They didn't have a Niner logo, unfortunately.
Silenyond bib and jersy:
https://www.aliexpress.com/item/Siilenyond-Lancelote-Pro-Maillot-Rock-Bicycle-Wear-Summer-MTB-Cycling-Clothing-Ropa-Ciclismo-Bike-Clothing-Racing/32679893065.html - The same guys that make X-Tiger. Quality is excellent. Again, I definitely recommend these. Fitting can be weird though, but after your first order you'll get it figured out.
Pulley/jockey wheel:
https://www.aliexpress.com/item/2pcs-MEIJUN-MTB-Road-Bike-Ceramic-Pulley-7005-Aluminum-Alloy-Rear-Derailleur-11T-13T-Guide-Cycling/32658360558.html - NOT ceramic, but at this price, whatever. Pay attention to your current wheel tooth count. I tried to run the 11T on my 12T SRAM Force CX1 rear derailleur and it did not work out so well. The set I put on my MTB is just fine though. I did break my first chain after installing these, but I'm not sure what the cause was. I'll update this if it happens again.
Crank boots:
https://www.aliexpress.com/item/MEIJUN-8-Color-Mountain-Bikes-Road-Bicycle-Cycling-Crankset-protector-Crank-Protective-Sleeve-Cover-Parts/32302294375.html - These fit my SRAM Force CX1 cranks pretty nicely. There's a bit of overlap of the pedal spindle, but it's not problematic since it stretches out of the way.
Warm riding gloves:
https://www.aliexpress.com/item/ROCKBROS-Winter-Gloves-Fleece-Thermal-Warm-Bike-Sport-Gloves-Motorcycle-Cycling-Bicycle-Equipment-Gloves-Full-Finger/32579893837.html - Minimal padding, but they've done a great job keeping my hands warm on a couple of 40*F rides. They also work with touchscreens.
Windbreaker:
https://www.aliexpress.com/item/ROCKBROS-Cycling-Clothing-Men-Women-Wear-Riding-Breathable-Reflective-Jersey-Bicycle-Bike-Wind-Rain-Coat-Jacket/891011759.html - This is badass. It's perfect for temps into the high 30s. I just wear this and a jersey, and I still sweat. It's very, very thin, so I was kind of bummed at first. But it's comfortable, reflective, has pockets, a fleece collar, elastic cuffs/hem, etc. Definitely recommend this.