Tj428cj

i am in the middle of changing clutch and flywheel and want to change gear oil transmission seals and gaskets well it out. but I can not seem to find them anyplace. Would also like to change what I believe is called rear main seal on the engine. Can someone plz send me link or any info at all plz. Can reply on here. Or feel free to email me At Tj428cj@gmail.com or by text need help asap plz plz plz