I will give you my sub box with sub for free if you pay postage. I sold it to a mate over a year ago then he gave me it back as he then sold his Z. It's been in my grans house for ages and she wants rid of it. It's not a double one like the zenncloser ones but its perfect fit with the thin boot carpet. Check the start if my build thread if you wnat to see what it looks like.
If for some reason OP doesn't take this I'd love to pay for it from you, second dibs if you must
Will give him a day to reply if not its yours just need postage and that will do just been lying about so rather have someone who would use it.