I live in Canada and RA-4 chemicals when I could find them were quite expensive. Fortunately, The Camera Store in Calgary sells chemicals manufactured by Flicfilm, which is based out of Longview, AB, just south of Calgary. They sell CD-3 powder in bottles, as well as sodium sulfite and potassium carbonate. The only other 2 ingredients you will need for the developer are Triethanolamine and pure salt (sodium chloride). If you can find a camera store that is a flicfilm dealer, you may be in luck.
The recipe to make 1/3 litre of developer:
2ml - triethanolamine
1.7g - CD3
13.3g - potassium carbonate
.33g - sodium sulfite
.17g - sodium chloride
The nice thing about mixing your own is that you can mix as much as you need and the dry chemicals last a long time.
The blix is not so easy to get. The fixer part is easy since that's just ammonium thiosulfate, but the bleach is hard to find (ferric ammonium EDTA). I understand you can use potassium ferricyanide as the bleach and fix in a separate bath, but that takes around 5 minutes to do instead of something like 30 seconds in blix. I found some Kodak 2 part blix in the Camera Store so am using that.