does anybody know where I can get a new or rebuilt carb for an 87 sub gl wagon, front wh dr. non turbo, 1.8 L?

I dont know about stock hitachi's.  most people weber them (DGV 32/36), which you can find at Redline.com.  if you need to get inspected they may black flag a weber though so check your emissions regs.

http://nationalcarburetors.com/cat-subaru.html

get a weber. my mpg went up 18-20 with the weber on it and I still need slightly bigger jets, its not too hard to install either

get a weber. my mpg went up 18-20 with the weber on it and I still need slightly bigger jets, its not too hard to install either

What is your mpg?  Are you saying you increased your mpg by 18 - 20 after you switched to a Weber?

I can have one in stock on Tuesday.