The PowerColor Gaming Station is an external graphics (eGFX) enclosure with ultra-fast 40Gbps Thunderbolt™ 3 interface. It provides a PCI Express x16 slot for a single or dual-slot high-performance graphics card (Max Gen3 x4 speed). I used it for 3 years to run an NVIDIA GeForce RTX 2070 SUPER from my laptop. I switched to a desktop, so no longer need/use this eGFX. It comes with the eGFX enclosure and a TB3 cable.
https://www.amazon.com/PowerColor-Station-Graphic-Thunderbolt-EGPU/dp/B0792NJ8QV
https://www.newegg.com/powercolor-model-gaming-station/p/N82E show contact info
https://www.tomshardware.com/news/powercolor-gaming-station-external-gpu-ces-2018,36290.html
https://www.thunderbolttechnology.net/product/powercolor-gaming-station
I am located in Georgetown and will meet you anywhere within ~15 miles of Georgetown.