audio buffs: can you get ~ 6.5" subs?

[Hate]

My celica has speakers in the sides at the rear which are (apparently) 17cm components which are completely shot (rubbish paper stock things)

Now, I don't want subs or 6x9s in my boot- but can you get decent quality 6.5" subs? I would get a pair (one for each side) and have them amped up.

I'm not looking for "phat bass" but I would like a little bit of fill. (I have got an old 12" sub, but I use my boot and fold the rear seats flat far too often to warrant that)

edit:

http://www.caraudiodirect.co.uk/product_info.php?products_id=3217

something like that.

or would they be rubbish?

 

[saitrix]

Yes you can get some. The first lot I found are not the cheapest thoug at £140.

http://caraudiosecurity.com/shop/product_list/c_path/60_64_123/spd/6-5-mid-bass-woofers.html

 

[Hate]

sweet

looks like you can fit 6x9s in the back