There is a great and reasonably priced frame shop on Uriburu just before Las Heras called Mecenas Tienda De Cuadros. Uriburu 1655 is the exact address. Very friendly and quick, great work. I get all my things framed there with him. I'm not sure the exact hours. I know they're open in the morning, take a break for a couple of hours mid-afternoon then reopen until early evening.