I don't know that you really need to buy all of that stuff.
Edgelow hasn't been mentioned much the last few years and not much info online either..anymore.. since he retired..
What kind of prices are you finding for the kit now?

I can't remember what all is in the kit..
but what I recall-
a ball on a stick - can be rigged up pretty easily or other things can be used to move the top rib.

diaphragmatic breathing - you tube videos

oxygen finger tester or tempo gauge - IMO not a necessity

you can do a search back a few years (2006 -08) or so here to find more edgelow threads/posts - you may have to change your settings to search back that far. Oh a google search shows posts about it in 2012.
https://www.google.com/search?q=Edge...-US%3Aofficial

Many here are find lots of help with expert PTs, body work, chiropractic and self care.
Some basics - foam roll, tennis ball/dog ball, Swiss exercise ball, corpse pose from yoga, learning self trigger point release, most of these are our home care helpers.