Iconic kits - where to buy?

I began following this club when I was 12 but couldn't justify the $100 to spend on a shirt. Hard to put the money aside as a high schooler working fast food and then as a college student with student loans (yay America). But now I'm finally at a point where I have the finances to support a collection that doesn't consist of knockoffs from China.

I want to start with the following kits from seasons I've watched personally:

• 2004-05 Home (Gerrard) - Champions League version
• 2008-09 Home (Torres) - ideally long-sleeved
• 2013-14 Home (Gerrard or Suarez)
• 2016-17 Away (no name)

Unfortunately I'm having a hard time finding genuine versions of these shirts online - can anyone help?

Also, please do recommend other iconic kits I should acquire because I am planning to take over my girlfriend and mine's shared closet with red!