I made a little How To Do since a couple of you HOG's were interested in more details.
Just use a piece of wood instead of a knive to show the riveting process.
Required Tooling:
Vice
File
Metal saw
Drill 6.5 mm (1/4“

Hammer
Little screwdriver
Hole-punch or steel rod (big nail etc) which fits in a ¼ hole
Required Material:
1/4 “ stainless steel tube 3-4” long
2 screws or bolts with countersunk head and a none threaded section. The one threaded section should fit in ¼” tube
Grease
This is a description how I did it. It is up to you and your responsibility if you decide to do it.
I recommend doing some test rivets to find out if the tube you use can be flared without cracking.
Removing the rivets:
The head of the original rivets can be drilled out with a 1/4” drill.
Be carefull and stop drilling when you notice that you break through the rivet material.
You can now easily remove the head with a little screwdriver etc.
Support the scale and punch the rivet out.
If you choose to use a nail cut of the spike to not expand the rivet and makes it difficult if not impossible to punch the rivet out.
I drilled a ½” hole in a piece of wood and attaché the knife with to little screw to it.
You can now put the wood in the vice and have both hands free for the job.
This way you support the handle well while punching the rivet through the handle in the ½” hole. Also works well when you polish the blade.
Installing the rivets:
Cut the heads of the two countersunk bolts off with little of the none threaded section remaining.
Cut the bolts short enough so they will not touch during riveting!
The bolt head must be big enough to flare the tube and to not touch the scales with the vice during the riveting process.
Cut of three pieces off the tube to be used for riveting
As rule of thumb, the tubes should be 3mm (0.12”

longer as the thickness of the handle of the assembled knife.
This may vary depending on the different scales.
You can also use the original rivet to figure out how long the rivet-tube has to be and if the rule of thumb will work.
Make sure that you clean the tube from burrs etc. otherwise you may get a not so pretty finish.
Grease the heads of the bolts slightly to make flaring easier.
Assemble the scales and stick at least two, better all three tubes fasteners in the handle.
Put the countersunk heads on each side of the tube to be flared and put it in a vice.
Centre the handle on the tube before pressing it together. Hold the knife in that position and start pressing.

Don't press to hard it does not take very much pressure.
Just squeeze it a little further once the rivet is seated.
You can always apply more pressure when you notice it was not enough but you can't fix a broken scale.
The rivets hold very well. I was surprised how well.
They will fill out the holes in the knife during pressing without any clearance left and will attach the handle rock solid to the blade.
No adhesive required.
Good luck if you decide doing it.
Let me know if you have any question.
Wicked