21" Bass bin plans

Hello all Im new here and hope this forum is better than the others. Im looking for plans/advice for dual 21" bass bins. These will be used with my existing outdoor sound system. Im looking for something with the dimensions around 62" wide, 30-35" deep, and 27-30" height. Would be ideal if they could fit under my old Peavey stacks( see profile pic) I have searched everywhere and hope someone on this forum can help. Thanks!!

Your profile pic is very small and cannot be expanded to see more detail. Those dimensions you could build a double cubo 21, but who would want too? Two singles would be much easier to lift.

Here is a bigger pic. Would like the Peavey stacks to sit on top.

www.freespeakerplans.com/plans/14-plans/basscab/6-cubo-sub