Don't worry Coelacanth, its also available in 3mm standard, with 3mm ball hole diameter and 3mm thread diameter. check out HOR racing site, and I think its $3.64 or something for the pair

. The 2mm ones pretty solid built, but for all of them, the rod end is AL, ball is steel and the bushing around the ball that hold it in the rod end frame is aluminum, unlike the $30 pair that have brass. Well if you want a diff one, go visit RC channel, they have beautifully rod ends too, at $2 one, it has the brass bushing holding the ball in place, but the ball is a little loose within the socket of the rod end, around 0.3mm or so. But try the HOR 3mm one, its great looking. Yeah get a link that has reverse or opposite threads on both ends, plastic rod ends can easily adapt to the threads.
Userunrelated -nice looking washers

Yeah why not put a little bling into the buggy! It'll look great. I have been meaning to point out the orientation of the head on the engine, turn it 90 degree in either direction so that the fines are parallel with the length of the body, you will have air flowing in between the fins for a more effective cooling
OK might have better luck next visit. I missed out on a heavily used tamiya vintage sand scorcher going for $40, had the body, old radio gear and all, but in a bad way, heavy scorch makes under the chassis, tires cracked and all, but all there.