Try http://riceone1.com/id17.html But all I saw were Mausers.
Otherwise I couldn't find anything. Apparently the butter knife handle isn't popular even with mannlichers anymore because its harder to operate, especially with a sticky cartridge. It sure does look nice though!
One problem with an MN is that the bolt handle is pretty far forwatd from the trigger and it'd be faster and more comfortable to cycle if you sweep the handle back some.
Jim the Boltman at http://www.mosinnagant.net/Boltman/Boltman.html has a bunch of MN bolts shown. No butter knives though. He did a great job on my 2 Mauser bolts, and for better fit with my scoped rifles I had him do it extra low and I filed the knobs flat - looks sexier! Still easy to operate.
I swear by Jupiter Optimus Maximus .... in the army of the consul Lucius Quinctius Cincinnatus and for 10 miles around it I will not steal anything worth more than a sestertius in any one day.