I did get some of the screws from McFeely's. Shortly after I noticed that my local Menards carried them
Last weekend I tried using the timberlok screws with both an axle puller and a crow bar. by far the crowbar worked best. The down side was that I had to keep shimming under the bar with white oak blocks to keep my pry angle at it's maximum advantage. Just yesterday I sketch up a puller tool that I could use with a cordless impact wrench and it would grab the head of the timberlock screw. I don't really have time to build it right now though.