Need 2 New Subwoofers?

I have 2 each, M&K VX-1250 subs in my 7.2 HT. One of the woofers just blew. I know I will never find the replacement woofer anywhere as it is too old. Can anyone suggest 2 woofers only that I could buy that would work in my 2 existing M&K cabinets and with the M&K amps (250 Watt each). These are 12" woofers and the cabinets are NOT ported. I would like something that gets down to 20hz or below if possible. Money is tight right now for this disabled retiree so buying 2 new subwoofers is out of the question. Thank you for your help, your time, advice, and sharing of your knowledge will be greatly appreciated. Have a wonderful day.

"How 'bout them Dawgs"
Edited by golffnutt - 11/18/12 at 1:42pm

Thanks so ;much guys for the replies.

I guess I am going to have to build 2 new subs from the ground up as I do not like the specs for the drivers you have suggested. I want 2 subs the will fill my 17x17x18H room with tight clean bass down to 18-20hz. Can anyone suggest where I would but the parts and cabinets. I would like the cabinets pre-assembled if possible, if not at least pre-cut and ready to glue/screw. Any recommendation on where to get both the parts and cabinets would be GREATLY appreciated. I don't need the cabinets finished, just pre-cut or assembled. Also what do you think 2 subs like this will cost me.

I also don't mind buying used equipment because this would be the only other way that I could afford a sub(s) of the quality I am looking for. Thanks so much for your help, suggestions, and the sharing of your knowledge with me. Have a wonderful evening.

Thank you LTD02, I will wait. Have a great day.