It's also time to replace all the terminal fittings, turnbuckles, etc. if they are stainless, because there may be enough crevice corrosion to lead to sudden failures now.
You really need to spend an hour making up a list, i.e.:
One forestay, #"x75 feet
One backstay, #" x 75 feet, split with two insulators (type, size) at
Six shrouds, #"x 60 feet,
terminal fittings on each, etc.
Then contact a couple of riggers to see what it will cost you. The most reliable thing is to drop the mast, give them the old rigging (all labelled) and have them make the new up to match. That's assuming you just want them to make it up and you're doing the installation. If you want them to install it--add.
If you are planning to DIY, you'll still need to make up a bill of materials in order to shop for the parts. Estimates aren't going to mean much until you've got that, or a quote from a sistership.