I want to know where I can get a replacement tarp for a sofa bed. I have the sort that is held on with springs, similar to a trampoline.
These are easy to find but you may be able to find one for your brand of sofa bed if you Goggle your question with your brand name.
Here are links to several but you will have to be sure you are ordering the correct size and the one that uses the same type of springs.
www.furniturepartsonline.com/
www.furniturepartsonline.com/
You may be able to find a kit in a local large furniture store.
Sometimes the frame for your sofa bed becomes damaged beyond repair. Finding a new replacement frame can be a challenge. This is a page about sofa bed frame replacement.