Hello Kyle,
Our water block BP-VG3090EVFTW is compatible with 3080TI FTW3.
The kit BP-TEKIT-3090EVFTW fits for Titan 2.0 too. Also, you need the PCI-E 4.0 bracket too. You can find the products at the following links.
If you have any questions, feel free to contact us.
https://www.microcenter.com/product/636424/bitspower-titan-series-gpu-cooling-expansion-kit-for-evga-geforce-rtx-3090-ftw3-series
https://www.newegg.com/p/37B-000X-004Y5?Item=9SIAEMWEYC1611