Is there a consistent way of finding trail ruins on a world with TerraformGenerator installed?

I am trying to collect every armor trim and music disc that exist on a server with a custom world generator plugin called "TerraformGenerator". I managed to get most of the trims and discs except the ones that are found in the trail ruins. The problem is that this particular structure is incredibly rare and I haven't found even a single one of them in 2 weeks. To experiment with the world generator, I opened a test server with it installed and here is what I found:

• There are ~3 trail ruins in a square that is 20000x20000 blocks (on a vanilla world there are more than 5 structures in the same square)
• They look a bit different than the vanilla ones, but the TerraformGenerator ones are always identical to one another (at least the middle part):

Here is how the whole structure looks

Here is how they look above ground

• Their center always generates in the top left corner of a chunk in a Taiga or a Snowy Taiga biome and they span across a 4x4 chunk square

Here is how they generate above the ground

• Their top is always 5x5 blocks and they are clearly visible on Xaero's map.

Here is how they look on the Xaero's map when they are in the Taiga biome

Here is how they look on the Xaero's map when they are in the Snowy Taiga biome

After testing I concluded that my chances of finding them with a world map are incredibly bleak (only around 75 pixels in a 20000x20000 area represent these structure which is only around 1,875x10^-5% of the pixels in that square). Keeping in mind that I can't ask for a world seed, and the admin will propably not give me these items without proper reasoning (even though I will have to ask him for the wild trim because the jungle temple doesn't generate on this plugin for some reason), what are my other options?