I know what you mean.  It can get frustrating sometimes, trying to find what you need at local electronics shops.  Sometimes, you begind to wonder, "What if I omit just this part..."Don't do it.  You've got the right idea.  Get out the credit card.  Go online and make a few clicks.  Take your best girl out to dinner a few times and forget the project for a day or two.  Next thing you know, the doorbell will ring and a guy in a brown truck will have everything you need to finish the project in a snap.