There are many renditions of the model, but the one that I've thought about getting for the longest time has been the old 1/60 vinyl kit made by Halcyon back in 1992.
Every time I see an article or video showing somebody's build of the model, I can't help but think that the figures are actually 1/72 rather than 1/60. I can't really justify the current price tag of the model just to find out though.
There is also a resin knock-off of the Halcyon kit, but from the pictures that I've seen of the parts, it looks to be a very poor copy of the original.
Recently, I thought that with a little work, some of the toy Space Jockey figures could be a cheap alternative.
As fate would have it, I saw a batch of Alien toys being sold as a lot on eBay. I put in my best offer, and a couple of days later the figures arrived at my doorstep.
The first figure is the one that I consider the best of the bunch. It is the Mez-Itz Space Jockey made by Mezco Toyz.
The figure comes with a large base as a separate piece, so it looks the closest to the Halcyon kit, and it also happens to be a hollow vinyl model. The only thing that I don't like about the model is that it has the flattened head typical of Mez-Itz figures. It is also inaccurate because the chest was not sculpted with burst open ribs.
The next figure is the Minimates Space Jockey.
The figure is a lot chunkier and not as well painted as the Mez-Itz figure, but it is a nice solid piece of PVC. It also has the flat head typical of Minimates figures, and Minimates arms as well.
The lot also came with the Deluxe Toys R Us exclusive Minimates Space Jockey.
The figure is pretty much the same as the regular version, except it is painted to simulate the lighting effects in the film.
The final figure is the Kubrick Space Jockey.
This is the smallest figure of the bunch, and also the hardest to find. It has typical Kubrick arms, but it has a decent representation of the Space Jockey's head.
Perhaps the Mez-Itz and Minimates figures are still a little undersized for 1/72 scale, but I think they would still look pretty good as terrain pieces. The main thing that would need to be fixed are the flat heads.