Has anyone seen a seam ripper kit...

[StephenM]

...with the replaceable blades? Here's a ripper:

And these are the blades:

 

[Dan Masshardt]

That didn't look anything like any of the kits available for turners.

The Berea / woodcraft one has a replaceable blade. Only beartoothwoods seems to carry them though.

At psi, you have to buy the whole insert to replace I believe.

 

[LagniappeRob]

That thing looks like it would rip more than seams. Looks like something a surgeon might use...

 

[monark88]

that's a scalpel. If you use this just google "scalpel blades" But I doubt if anyone would want it for a seam ripper. They are super sharp.

 

[nava1uni]

That is a scalpel. I have used one for years at work.