When you say west, does that include Turkey as well? Imo, sooner or later Pakistan must increase it's relations to Turkey to a level, that allows JVs or co-developments, since they might be one of the few countries that would allow such things, but most importantly to get an alternative to China as well!
China of course offers Pakistan way more than the US ever had, but replacing dependance on one country, by beeing dependent on another won't help you either. Diversifying is the key, splitting the dependence on different foreign reliable partners on the one side, improving own capabilities on the other.