As the tittle said , I’m looking for the rear right for the 72 Yamaha LT2. 

Any indicators of that style and era (front and rear), up to mid 1970s small capacity RDs, should fit, so don't limit your search to just the LT2. However, there were at least three different lengths of stem, so measure your existing left one to ensure that you get a match.

Another thing to look out for is the depth of the lens - your bike probably had the deeper ones originally, whereas later ones were shallower. You might not be worried about this, but it's nice to be aware of the differences. 

This might work you need to measure or buy 2 so they match. I’ve bought some parts from them and they are fine to deal with 

HT1kid, both of my rear are in red lenses not orange and i want to find a origal one. My rear right one is still working but i just need the one in decent shape. No hurry at all . 

• GR8UNCLEAL  , i believe mine has the longest stem one.