I find HD to have the best price for blinds. Even when compare to online places. Blinds at HD can be cut to match the width and the height can be adjusted by yourself. I assume you’re talking about horizontal faux wood blind and not vertical blinds?
I’d like to know where you’d go locally to replace fireplace glass door as well. Nothing at HD/Lowes will fit. I know a good handyman who can probably do the deck for you. Let me know and I’ll give you his contact.