The answer is no, not all steering dampers have the same dimensions. They vary in their minimum compression and maximum extension range and also in the size and type of the mounting holes. The factory Bilstein damper has an extension of approximately 440mm to 620mm, so you need to find a replacement that covers this range. The factory damper also has 14mm mounting holes, many of the alternatives may have mounting holes of 16mm so you need some bushes to fill the gap. Steering dampers made to suit Landcruiser 60-105 series should be suitable replacements, those made to suit other Cruisers may have different compression ranges and are not suitable. I fitted an Ironman 4X4 3524 damper in April last year and it has been awesome, steers exactly like a normal truck and no "death" wobble. At full retail its US$149 with free delivery to your Texan doorstep so might be worth a try, check it out
here. I went for this as its a well priced modern foam cell damper plus it has a plastic bell housing that covers the piston shaft (no bonging, keeps the merde out and should flex if impacted).
Here are my posts covering fitting this damper:
https://www.theineosforum.com/threads/steering-stabilizer-bar.12415420/post-1333278857
https://www.theineosforum.com/threads/steering-stabilizer-bar.12415420/post-1333279399
I say give it a go, if in doubt just try removing the factory damper and drive around the block. It gives you a very quick and clear indication of how this truck can feel with an aftermarket damper fitted.