Help with Mustang timing belt

[Steve M]

With a mere 110,000 miles on the ol' 4cyl Mustang, I decided to change the timing belt. All comes apart real easy until I get to the crankshaft sprocket. It has a hub on it that's held in place with a 3/4" bolt deep inside. I can get a socket on it but I can't hold the hub from turning while I try to break the bolt loose. I tried putting two of the pully bolts in and used a big screwdriver between them to hold it but it's too tight. I don't want to bend the smaller pully bolts. I've seen a tool somewhere with a long handle and a Y on the business end with slotted holes used for holding pullies in such a case. I've searched the web trying to figure out what the tool is called and who carries them. I come up with nothing. Any help on what the tool is called and where I might find one would sure be appreciated.