I bought mine (tubing) from a local LC and found her thru medela website. at least i save shipping by picking them up myself. The parts, i just bought from BRU and use coupon if you have one.
I have a friend who works at a local pharmacy that rents parts...and she was able to get me the couple of parts I needed for free. ?You may check with any place that rents them out. ?They have to have replacement parts for theirs...so maybe they'd sell you what you need.
Re: replacement parts
Call them b/c my friend last year got a new pump where her's stop working. Guess it depends on what's wrong and how old your pump is....
Also check this site out:
https://www.momsmaternity.com/store/category.asp?category=74
Natural Miscarriage 2006
BFP March 19th! - Due Date11/25/14
mybreastpump.com
I bought replacement tubing and a few other things.. they were sooooo fast! =o)