2008 factory sub swap?

[Jzemaitis]

I picked up a sub, plastic box, and the plastic trim at the yard last month. I connected it to a 200 watt 2 channel amp. I sound deadened the box to help some of the muddy sounding base I was hearing. I always stuffed some poly fill in it. Which helped. I’m wondering if swapping out to a different 6.5 sub would make a big difference. I saw an old post but didn’t have pictures of the final product of a vibe with stock box with an 8 inch sub. I was considering the whole fiber glass thing but I’m hoping the plastic box would do good enough. Any input on what 6.5 might work or if someone has pictures of a stock looking later sub in their cargo area. Something that looks stock-ish. Thanks!