ISO: Case for ITX build and custom CPU/GPU loop

May I request some help on selection of case for first-time custom loop ITX build? I attempted to retrofit NZXT H1, but that proved to be a little ambitious for my first project, so I'm looking for something that's compact enough to fit reservoir (to simplify loop filling). Here are the parts I have on hand and what needs to be cooled:

* 12600K - EVGA 2080 Ti with EK Quantum RTX block * [Modultra LoBo water block](https://modultra.com/shop/ols/products/modultra-pump-block-plain-heatsink-combo) with DDC pump * 120mm EK radiator and 140mm Alphacool radiator * fittings for flexible hoses and EK ZMT tubing.

In terms of cases, I've got another air-cooled build with H210, which is decent size. A little smaller won't hurt. I intend to pull PSU from NZXT case and junk the frame. Regrettably the built-in AIO failed and NZXT doesn't sell replacement separately (although it looks like X41 AIO, which they also don't make anymore).