I've found copies of both in public libraries, if yours don't have it, they should be able to get it on interlibrary loan for you.

Otherwise I recently bought a copy of one of them on ebay. Just search on the authors name and keep looking until the space clearing books come up. Otherwise if you have a metaphysical book store near by they may have a copy already (esp Denise Linn as she has written a number of popular books on various topics).

Good luck!