Based on your time constraints, I believe a Bell & Carlson Carblite Classic with a do-it-yourself pillar/bedding job would solve the the flier problems your getting with the tupperware stock. I would also consider a Savage LA hardwood or walnut stock. Many don't realize the weight of the hardwood stock is only 3 to 4 more ounces than a tupperware stock. With a bedding job they are a good choice and will improve accuracy. There are numerous aftermarket laminated stocks that will work with a long action. They are a little heavier than the options mentioned above.