My anvil is a piece of steel 30" x 40" by 2 ", I think that figures to be 700 lbs. It is welded to a base at the height of a bench. No holes in it yet and it doubles as a welding table.
google spit up a lot of stuff. Try starting here. Chuck Robinson’s Work | Gulf Coast Blacksmith Association
Chuck is still around, however he used up the stock he acquired to make these anvils a while ago... I know the guy who got the last one.... probably why the link is dead.... Were you looking to acquire one (near impossible as everyone who has one is probably holding on to it :0) or make one? I can take some pics of mine (I have two of them :0) if you wanted some ideas.... or find some links to some out there... Hope that helps.... Bear