They list reference 1080Ti as compatible. Not generally custom solutions from the board partners. Sadly this card, already being water cooled, won't typically show up on anyone's list of compatibility for any other cooling solutions. Already is a semi-custom solution.
In reading that other post I can't really improve on the suggestions, other than offering specific part selections if you want to go down one path or the other.
"2. Completely remove the water block and back plate, and replace the cooler with an all-in-one (AIO) liquid cooler using an adapter. The NZXT G12 ($30) is the only adapter option I know of. You'll have to also buy an AIO liquid cooler for about $60. The end result will be similar to what you expected from this purchase. Obviously, this will also void the warranty.
3. Build a custom loop around the GPU. It'll be expensive enough that you're better off adding a CPU block (etc.) and running a full liquid loop. This could actually be a fun project! Though it depends on how much time you have. "
Just need a pump/res combo, a radiator, and 4 fittings to make a simple loop. There are also res/pump/rad combos out there.
Basic 240mm or 120mm radiator (120mm if space is limited)
https://www.ekwb.com/shop/ek-coolstream-classic-se-120
https://www.ekwb.com/shop/ek-coolstream-classic-se-240
Pump/Res
https://www.ekwb.com/shop/ek-xres-100-ddc-mx-acetal
Tubing
https://www.ekwb.com/shop/ek-duraclear-9-5-12-7mm
Fittings:
https://www.ekwb.com/shop/ek-acf-fitting-10-13mm-black-4-pack
And you will need two static pressure fans: EK sells some, but you can also pick up anything with Static Pressure listed as a feature. EK's are decent from what I know, I think they are a Sharkoon derivative, but don't quote me on that.
https://www.ekwb.com/shop/ek-vardar-f3-120-1850rpm
Option 2 above is much cheaper, but it does mean giving up the full coverage block which is more effective.