I have been fooling around with the import brushes quite a bit, and in one respect they are more generic in parts used, and in another they vary so much it is really tough to tell what is what. The nozzles are one area I can not make heads or tails out of - I have more than a few different brands here, and not one nozzle seems to be the same as another - making it hard to pick a replacement if not knowing the actual brand name to order from...
The needle, on the other hand, seems to be quite a bit more generic. Just looking at the two you have there, I would guess that the top one is most likely a .5 or .7, and the bottom one (this is an edit) - after poking around, it looks like it may be a .3. I have had zero problem in taking one needle from one brand, and using it another. I even find many times I can improve performance be swapping to a name brand needle, such as using an Iwata needle in a Chinese brush. Worse case scenario, you would have to clip the back end off if you had a replacement that was too long.
Now, I can not guarantee you you will have 100% success in blindly choosing a replacement, but I would think your chances are very good provided you try the correct size...
Last but not least
I will poke around to see if I can get any closer to actually identifying the brushes you have, to try to find the recommended replacement and come back to update if I find anything...
Edit: After poking around a little, I am just gonna throw this out there - the top brush can be had for under $20, and the bottom one for under $13 - if they need replacement parts, it may be better to just purchase another one