Bob,

I take it the barrel on your HW98 does not have grooves (you should be able to see without removing the shroud) ?

If it does, all you would then need to do is machine part of the shroud away to expose the dove-tails.

If no dove-tails, you can get an HW95 barrel with the dove-tails, and then get the shroud machined.

A 3d printed sight block could be made to slip over the shroud ?

My HW95 Super Match, came from Waffen Schneider in Germany - looks like they only have the 'Match' version (minus barrel shroud) :

https://www.versandhaus-schneider.de...ducts_id/22499

Have fun

Best regards

Russ