product links:
1.https://www.lowes.com/pd/Backyard-Discovery-Laguna-Cabana-Pergola/1002701144 

2.https://www.amazon.co.uk/Xingshuoonline-130x130x197-Impregnated-Pinewood-resistant/dp/B07JVVD9SJ 
(this custom size 180x180x216)

3.https://dunsterhouse.co.uk/gerlinde-w2-07m-x-d2-07m?gclid=EAIaIQobChMIr5C6gfTV2wIVSWYbCh2i6AxqEAkYASABEgKjHPD_BwE 

other 3d pergola:
https://3dsky.org/3dmodels/show/pegola_corradi_outdoor_living_space_7