Over at AK is a thread of what speakers everyone would like to see resurrected. So using Great Plains' drivers; 416-8c, 902's, some crossover I don't know what, and a used 511b horn with those $900 M-23's on E-bay, what would it cost to reproduce all of that?

Altec Lansing Model 23 (19) Cabinets! For 511B Horns | eBay

Great Plains Audio's Products (No Prices?) And I see that they are going to start offering complete packages.