Sorry, the AmiFast company was in Indiana, not Rhode Island (I just found my invoice and installation instructions).
The company that made the AmiFast boards is ProvTech, R.R.4, Box 72, Washington, Indiana 47501; Tel #812-254-1721; email provtech@hotmail.com
this is old information from 1998 so I doubt they're still around, but thought you would like to know.