I make some of the patch panels sold by the major venders. I have a inner cab corner that does the bottom 4" (usally all you need) for alot less.You guys with 47-48 trucks can not use the new ones out of China, yours are differant, but we have them. A new part we have out is the bottom or the back of the cab so now you can conect the outerCC with new metal if you need it.Email me with needs. I sell direct to Stovebolters for less.