I got this fun little rifle a few years ago from my FIL, just haven't done much with it due to other toys needing more attention

So, last night I tore it apart and gave it a complete cleaning (something my FIL doesn't believe in, lol), thinking that was the reason why the action was sluggish and would not completely close all the time.

Well, it is still sluggish and I'm thinking that one, or both springs are just plain worn out.

Would that be a fair assessment? And were would I get replacement springs?

Any help is greatly appreciated!