$1100 is a good deal. You can find them a little cheaper if it doesn't have the original barrel but the original barrel is what most collectors look for. To put it a different way, original barrels have been selling by themselves for $400-800. Average price on complete kits is around $1500. Both receivers mentioned would work well it's just a matter of how much you want to spend. Nodak receivers are high quality basic receivers whereas 74u llc receivers are as close to original as you can get, right down to the style and number of spot welds, lettering, and selector detents. They are double what a nodak will cost but in my opinion they are worth it. As far as builders go, Troy Sellars at InRange would be a good choice and there are countless others.