In Canada here we had a Rona hardware store that carried a plastic downpipe but it was special order. I was thinking of getting a few, but already have quite a bit. It had different colours like brown and beige, which is what I was thinking of. That was a couple years ago. On the website it seems like it is ribbed. Not really ideal. Not sure if they still have the smooth. There is a "Euro___ type too that is 2" x 3". Anyway Plastmo is the brand. Not sure of availability. https://www.rona.ca/en/plastmo-k-sna...k15021-5539012 It is not cheap, but is in Canadian$ which is only worth $0.77 right now.