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it is fairly easy to remove broken bolts with the right tools and experience .
assuming You don't have a drill press . I would suggest You take the part to a machine shop and asked them if they have experience of drilling stainless steel if the answer is yes they will have to grind surface of the bolt Smoot and then center punch and followed with center drilling and then drilling with a smaller drill bit . if they don't have extraction tool they should be able to make one from a old tap after that You should be able to use the same sized bolts as before
to give You an idea those two bolts will cost You about $35 to remove in USA
if You need more specific information , please let me know .
if You are going to do the above . please take it into a shop before You try , because without the right tools . if the surface gets hardened or off-center, job will be more difficult.
Good luck .