How particular are you on the make? You may consider going on gunbroker and picking a left hand savage in any 30-06 based cartridge. It is not that hard to rebarrel the Savage. You just need a barrel nut wrench and a set of go, no-go gauges. You can pick up an Adams & Bennett Barrel in 35 Whelen for $130 froms Midway USA.
I've got a remington semi auto 750 I'm trying to sell. It's unfired, has a new and better recoil pad and a saik removable muzzle break (cost me $240 on it's own). I'm getting rid of it because I can't take a semi to Africa and am making a new one out of a bolt action 30-6. I'll sell it to you with the muzzle break for $575 and without it for $475. Email me if interested.
There can be too much of a good thing with antler rattling.
I like to hit the horns together for a good 30- to 40-second rattling sequence and then hang them up and resist the urge to hit them again.
This works to the hunter's advantage, because if a buck has heard it, he may have been 300 or 400 yards away and he comes in and he's not exactly sure where it came from.
When finally is time to rattle again throw a slight change-up into the routine.
The second time, don't rattle as loud...