Ok. For anyone who may be looking for the authentic Mitsubishi part numbers for a 4ws. Here it is:
Original Credit goes to Besso for using this diagram in another 4ws post. I'm attaching it here since my question was Specifically related to the part numbers themselves.
Also the website autopartmaster.com claims to sell all the lines still. The prices are very very high and appear to be shipping from over seas, but if anyone has the means they seem credible. Hope this helps others going forward, I'm likely to delete my 4ws as I am on a tight budget as of now.
Thanks again for the help