I just picked up a 1-15 cab. with a D-140 for $150.00 today!!
It's dated 1968 inside, I believe it is eather a Sonic 1-40 or 1-40/C60 I'm not sure what the differance is but it's half of the 200S cab. the guy I bought it from also has two of what I believe are Spectrum 1 cabs they are 24" by 38" by 11 1/2 " one has a D-140 the other has a 15" West Labs
They are both in good condition,I think they originally had D130's, they are in the L.A.-O.C. area he's asking $175.00 for the D140 cab and $150.00 for the other the e mail is steven_west20002000@yahoo.com