try this Del-Ton, Inc. A complete line of AR-15 Rifles, AR 15 Parts and AR15 Accessories.
they did have some ar kits in stock before xmas but i don't know bout now though
they might have some kits and some rifles but if you can find 1 your gonna a 4 to 6 weeks wait or longer just to get it in this whole supply and demand thing
but all the other places like stag,cmmg,model1,dpms,rra, and bushmaster their all getting hammered with orders.
good luck to ya hope you find 1