This will work with vinyl replacement windows if you can't make something yourself.
https://www.amazon.com/Ivation-Conditioner-Mounting-Support-Bracket/dp/B07CZH178M/ref=pd_lpo_201_t_0/132-2913667-3794760?_encoding=UTF8&pd_rd_i=B07CZH178M&pd_rd_r=8acf0bc2-38d1-4999-9983-7fe08716a771&pd_rd_w=1y1Va&pd_rd_wg=PHoTe&pf_rd_p=fb1e266d-b690-4b4f-b71c-bd35e5395976&pf_rd_r=W2TA9NM8P4TWWYEZ5GMJ&psc=1&refRID=W2TA9NM8P4TWWYEZ5GMJ