Remanufactured Rack and Pinion is one of way. but too expensive.
As you say, they will need new rack ends (tie rods) to rebuilt steering rack.
Perhaps there are generic similar parts.
I found that Toyota Crown (210/214 type) tie rods are very similar.
Its screw diameter is 16mm and the pitch is 1.5mm
On the other hand, all of my other SUBARU's tie rod is 14mm x 1.5mm. It is not able to use for SVX.
https://www.monotaro.com/p/3029/3427/
Parts No is 45503-30150.
It's cheap at around $35, so I'll try it later. I'm currently overhauling the brakes on my other car, won't be able to use a lift for SVX until that's done. I'll tri it once my lift is free.
BTW, There is some play in the universal joint of my tie rod.