Wanted Cat D8 2U/13A transmission parts.

My brother is looking for this main tranmission shaft and hub (either style) from an oil clutch D8 2U or D8 13A. First style is one piece shaft and hub 9F9079 or the second style that would also work( 2 piece shaft and hub) is shaft 2H6087 or 2H6064 and hub 2H6063. He's converting his tractor over from a dry clutch and the current original shaft is longer and won't work. He would consider buying  a complete transmission if need be. [attachment=75597]20240222_185234.jpg[/attachment][attachment=75598]20240222_185231.jpg[/attachment]

I have some old CAT trans. shafts from D8 dozers. Where might I look for part # on these shafts. I probably have the gears and bearings also. Where do you live as this stuff is heavy and so $ to mail?