Originally Posted by nerdysmurf
Get a hacksaw and a vise and half block it yourself. I'm pretty sure there are some websites that sell the halved block and the new pump rod you'll need.
What I did...measure twice, cut once and clean it up with a good file.
You can buy the bolt, sled, and pin through White wolf or if you want to be brave, rob long is selling cheap parts on ebay but there is a 50/50 chance you'll get scammed.
Edit: As of now, whitewolf isnt selling halfblock pump arms, you have to cut a fullsized one down and rethread it