Re: steering chain
Did you catch the #2 post above? It's a standard chain of some size, SAE or metric. Get to know Mcmaster-Carr and Grainger, it's competitor. M-C's online catalog is particularly easy to use, because it steps you through from the general idea to the specific item you want.
Look carefully at the sides of your chain link. You may find a little number stamped on, such as "45". That's SAE size 45 drive chain.
Never let anything mechanical know that you are in a hurry.