Yes, I'd definitely buy bags for my shapes - but I wouldn't pay the prices on Liberator site for some of them! My Wing fits perfectly in a standard pillow case and my poor Pulse has to live in the bag it came in.
If Eden sold the bags, I'd grab them for each of mine if the prices were reasonable.
Really though - for the price of most shapes, it wouldn't cost Liberator much to add them automatically! Even if they put the shapes up like $10. They wouldn't cost a lot to make.
I have thought about making my own - perhaps I should stick to that idea!