Gear question

[fstnd]

Some time ago my clutchbell ended up like this:

Which was a sad experience because it is not available anymore (16t 0.8m). I thus want to convert both spur and clutchbell now into 1 modulus. What would a downscaling of the ratio 50t-16t 0.8m be into 1m? So the gears still are the same size

 

[WickedFog]

Your 50t .8 should be around 41.6mm diameter. Your 16t .8 should be around 14.4mm diameter.

Comparable diameter mod 1 gears would be
40t which is 42mm diameter.
12t which is 14mm diameter.

 

[tudordewolf]

I think you might still be able to find a suitable 16T mod 0.8 clutch bell, like this one.

For mod 1, your original ratio was just over 3:1 so I'd go with 13T & 40T to keep that, and 13T is easier to find than 12T.