Does this router bit exist?

[LancsRick]

I can't find this so I'm hoping it wouldn't be a custom router bit job.

I've got a load of matching to do that will allow a piece of timber with a radiused corner to snug up against another piece. Now I could do it as a two part operation with a flat bit and then a core box cutter, but I was wondering if cutters exist that are a flat top with radiused corners? Effectively a ball nosebut without the bearing and with a flat top.

Radius needs to be approx 10mm.

 

[Alpha-Dave]

Like a bowl/surfacing bit, but with a 10 mm radius?
https://www.wealdentool.com/acatalog/Bowl---Surfacing.html

 

[Tris]

Do you mean a rule joint, like a drop leaf table would have?

 

[LancsRick]

Do you mean a rule joint, like a drop leaf table would have?

Not quite, I could do that with a core box, it would have a flat section too.

Like a bowl/surfacing bit, but with a 10 mm radius?
https://www.wealdentool.com/acatalog/Bowl---Surfacing.html

Yes! I'll see if I can find a 10mm now I know what they're called, thanks.