"Where can I buy affordable bras in 36K?"

 answering this question https://www.reddit.com/r/ABraThatFits/comments/xl6wmh/does_anyone_know_where_to_buy_36k_bras_for_cheap/

Poshmark, Mercari, Ebay, Vinted - these all work for the U.S. 

However I went on to Canada's Poshmark - not one in that size! (most were mislabeled). 

I searched like Broad Lingerie https://shop.broadlingerie.com/collections/sale-1?gf_238106=36&gf_238108=K  they actually only have three bras in that size. 

Possibly amazon as well.