Not to sure what you mean by a kit. Sharp drill bits, plenty of lubricant/plusgas or equivalent and one of these https://www.cromwell.co.uk/shop/hand-tools/screw-extractors/industrial-quality-screw-extractors/f/1220?query=bolt%20extractor
Just various sizes, so I have them on hand in the future if I need them. I've been advised just to drill them out and just use a longer bolt and bolt straight through instead anyway.
Longer bolt and drilling out will also mean a larger diameter size bolt, if that is acceptable.
@Nef started
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Not to sure what you mean by a kit.
Sharp drill bits, plenty of lubricant/plusgas or equivalent and one of these
https://www.cromwell.co.uk/shop/hand-tools/screw-extractors/industrial-quality-screw-extractors/f/1220?query=bolt%20extractor