Was about to offer you my Xeon box, but re-read that you want double TR 1950X performance :D
Anyway, the E5 V3 Xeons mentioned before, and also E5-2686V3 or E5-2696V3 roughly equal a single TR 1950X. If you can get them in a pair (or just 100% same stepping). There is also modded bios for most 2011-3 socket boards, including some dual-socket boards. With that and proper cooling, you get 10-20% more out of those Xeons.
Upside will be lower space and other part requirements, especially RAM. Xeons work well with 2133MHz ddr4, both normal and server type, which are much cheaper than higher speed ram needed for AMD TR.
If you want some tests or info from a single E5-2686V3, just ask ;)