Tom manners does a stock for that action.
The trigger is basicaly the same unit as the Howa 1500, but they are not interchangable because the location screw that holds it to the action is in a slightly different possition, also the Howa is a 3 position the weatherby only a 2.
The triggers are actualy pretty good, they can be wound down quit low, certainly down to just under 2lbs, the problem is you can wind them down low enough that they are still safe and wont slam fire but you wind them past the point where the blasted safety catch will still work,
Ive tuned loads of Howas and vanguards, it is possible to alter the innards of the trigger with a little re machining, stoning and polishing and get a safe reliable trigger that breaks at 500g ( just over 1lb) but its a heck of a lot less work to swap it for a timney.
Pete