For decades, the Pikler triangle has been around, but they have only recently gained immense online popularity. Everyone is confused about where to buy a triangle from Pikler and what kind of triangle from Pikler to buy. I totally get it. I've been there too. I've done extensive research on the best triangles out there only to find that most of them are made in Europe. There are a few manufacturers in the United States, but the rates they charge are utterly insane.
That's good news for you if you're from Europe, but if you're not, you have three options: either import it from Europe, overpay it for US-based businesses, or create your own pikler triangle. Believe me when I say that costs are extremely high for US-based businesses. Many would love to help a local company, but most just can't afford it. I already have my own children's shop in Montessori/Waldorf and I know exactly how much it costs to make it.
Even if you build it yourself (more on this below) the price of the dowels alone is quite high. These days many triangles aren’t as simple as Dr Pikler designed them to be. You can get different heights, different structures, it can even be transformable. Every parent buys a ladder/slide ramp for it as well. You can even buy a pikler-inspired wooden gym! There’s nothing wrong with that, all of these products are amazing and your kid will enjoy it. Just keep in mind that the original purpose of pikler triangle was to keep it simple.