Lavandería with large capacity washer/dryer???

I have a large duvet cover that needs to be laundered. It's made of denim fabric and too big and heavy to wash and dry in my standard washer and dryer. There used to be a lavanderia in Plaza Interlago near Tio Sam's with large capacity w/d, but it's no longer there. Anybody know of another place? Thanks.

I had a kingsize bedspread washed at the laundry by the Waffle house , it came out great...

Perfect. I was going to try that place next. Traffic being as hellish as it is, it's good to hear confirmation they can deal with oversized items before slogging through town. Thanks, artsnob.