pimpmykeyboard.com has some nice options that are normally available. Check kbdfans, kono.store and novelkeys as well. Also, I recently found out about r/MechGroupBuys which seems to have popped up recently. More on reddit.com

Firstly, the keyboard itself is very very good, connectivity and battery life are both brilliant. Its a shame about the keycaps that come with it though - for a cost of 150+, I'd expect PBT caps atleast.. And then we have the non-standard stabilizer stem positions (backspace, enter, capslock, right shift and space) - which rules out using other profile keycaps (XDA, etc), and little to no keycaps for sale from logitech. The built in caps show signs of use within a day - they will wear out with a shine over time. For some, it may be a symbol of a key-warrior, not for me though - I prefer a well-maintained/fresh look.. :) If you're looking to customize this keyboard's caps, your choices are determined by: Custom stabilizer stems - this means you have to live with the built-in keycaps for these keys; and this also means low profile caps/sets Not all low profile sets match the full keycap configuration (even apart from the custom stabiliser keys mentioned above) - so you'll need to use some of the built in keys Top row configuration is different - this can be an issue depending on how much you use the KB for media play/pause, etc (I use the mouse, so I dont care) Low profile PBT with backlit keys are even rarer If ABS is the only option, then I'd suggest using white keycaps instead of black/grey - these tend to take longer to show signs of use I ended up getting low profile keycaps from Keychron - 2 sets (1 black and 1 white), and added custom (my own) stickers on top for those keys that have to be the Logitech's. Profile/shape of the Keychron caps are slightly different to that of the Mini - but I can live with this. Backlight is off (doesnt work with this keycap set, but the contrast is good enough that I don't care). What I ended up with: [As you can see from the image, the 5 keys with custom stabilizers are still the logitech ones] The keycap set link: https://www.keychron.com/products/low-profile-double-shot-pbt-keycap-set Other low profile set options: Nuphy Air coast 75 as someone already mentioned (has to be grey, but this is PBT) Link Pulsar low profile set Link [Not sure if this is PBT] Azio's low profile set Link [Disclaimer: the description seems to state that they are not compatible with non-Azio keyboards because it uses 'custom triangular stems', but a photo of the keycap itself shows a standard + cherry style stem - so I'm not fully sure] Disclaimer: I DON'T work for any of the companies mentioned above - I just like my KB but I don't like usage marks.. :), and I have tested only the keychron set (I'm currently using it), your results may vary.. Hope that helps. More on reddit.com

Sells a variety of gaming and ... keycaps from Tai-Hao, Ducky and more. They are Canadian based with good shipping rates and free shipping in North America on orders over 75 CAD. Overclockers UK - Stock: approximately 81 products, but each color option has own unique entry and ... More on reddit.com

I really like the quality of enjoyPBT. good value for the price. thick pbt. usually < 100 for a set More on reddit.com