new parts?


ive started freelancer last sunday and it's kickass sweet. Anyway, how do I get good weapons for my class? I know how to buy weapons, but none of the arms dealers on planets i pass through on the main missions have those weapons in stock! the quantity is always 0 -.-
Should I do more 'bar missions' and get weapons from enemies I killed?
Im level 10 now and im at planet Leeds, where I have to gain 1 more level to continue the main missions, with juni and sinclair.

thanks in advance,