it's a big job, and very tricky to get them back in properly, as they need to be correctly aligned. You can get the fabric from lots of places, at a price.
Try SLS hamburg, and KHM Cabrio in Stuttgart.
I'll sniff around and see what I can find on removing the soft top. I'm sure I've seen something somewhere.
ACMS Mercedes Ltd is an independent Mercedes-Benz service specialist based in Walsall. The company provides high levels of customer service and quality workmanship, at competitive prices. Call Mark on 01922 634666 or 07530 456000