Superior/Ideal Transjack

[2buck]

My Superior/Ideal Transjack (Oskaloosa, Iowa) was bought 30 years ago. The paperwork says it is a Model J-101, stock number 74-101. It has now developed a bent lead screw due to numerous friends' usage. I cannot find an address for the company.    Anybody know of where I can buy another lead screw? If not available (probably now made in China or Mexico) I will sketch one up & get one made.
Thanks for any leads.

[enjenjo]

I can't help you with the manufacturer, but McMaster Carr carries a bunch of sizes of Acme threaded rod, you probably can get the size you need from them