Complete noob and need help on blade replacement question
 

I just got my son a small electric heli for Christmas and promptly smashed the blades (me, not him!) and am looking at replacements. It seems they are about $5 per set. This isn't exactly putting me out, but I can't seem to find bulk sets. I'm sure these won't be the only ones we'll be breaking any time soon.

What I bought him is this model.

http://www.sourcinggate.com/x-max-60...rs-p-6552.html

It seems they are made for a few different suppliers, under a couple different names. It appears to be a nice little unit for him to learn on and was VERYeasy to control. Until I got my hands on it, of course.

Anyway, I'm curious as to whether or not anyone knows if there is a 'standard' to this type of blade (they are marked "A" and "B") that may have some universal/generic equivalent.

Any info would be a HUGE help.

Thanks in advance.