Get crc from walmart or some auto shop place...
Maru lube can be purchased from speedcubeshop or from cube depot. There is a knockoff maru lube on lightake.com as well.
You can also buy low weight shock oils. These are pure silicone and are typically found online at anywhere google will find it or at local hobby shops that have r/c cars and or model train sets...
the type A5 cube is very crispy if you like the feel of your type c. On the other end of the spectrum, Type f has become popular, f2 is a good cube. It has rounded cubies that give a bubbly feel. Dayan guhong is very good cube and is fairly new. The guhong is a very floaty feel and is very forgiving to rough cubing. Also, this is the fastest cube I've ever had, and many other testimonials from forum members would agree. The A5 is very nice once modded and broken in. F2 is also good but when it starts go get gunky, it performs like crap, more so than the latter 2.
the type c is still an alright cube, but as you probably know its not very forgiving under rough cubing... the cubes they've been producing lately have been progressingly more forgiving...
Hope this helps!
Also, lol@maru glue.. it looks kinda like it, but is much the opposite!