Insulated Draperies Can You Buy A Separate Thermal/insulated Back For Patio Curtain Panels If One You Want Doesn't Come With It?

Can you buy a separate thermal/insulated back for patio curtain panels if one you want doesn't come with it? - insulated draperies

I searched everywhere, but I love are unlined. I really need support / acrylic heat for the city, now allows all the projects I was asked if there any way I could still get it as a separate room, but hanging with the panel. I do not want to spend a fortune on custom curtains and have the opportunity to do it myself. Thank you and Happy New Year!