I would first have to accept your premise that abortion = murder. I don't, my church does not nor do many other religious denominations.
Secondly, regardless of what you think, I think, or anyone else...abortions have been performed for 1000+ years for a myriad of reasons. So until you can resolve all of the many reasons women seek abortions, your opinion about them is rather moot and they will continue to occur.
Third, if they will occur regardless of being legal or illegal, if women who seek abortions are willing to risk their lives, subjecting themselves to coat hangers, blunt force, poisons and other life threatening options then why risks two lives because a woman wishes not to carry a fetus to term?
If the abortion will happen regardless, why dispose of the tissue that may save other lives?
Nobody has an abortion to supply fetal tissue, or "body part" as you suggest. That tissue is the result of a decision a woman has made for whatever reason. Reasons frankly that are none of your business and only between the woman and her God. Perhaps whenever you think you've obtained god status, you can have a say.