Valley Machine makes all the T-5 conversion parts needed for the Model A. Open or closed drive line options and even a speedometer adapter
http://www.valleymachineshop.com/model-a-parts.html
The real reason the grounding strap is woven of many fine conductors, is due to the electrical property of high frequency current to travel on the surface of conductors. this is known as the "skin effect" and was well known in the '20s and before. It is important to shunt high frequency...