Mattress Forum

Dear "9";
I agree whole-heartedly.  First, let me mention that my back issues are caused by the bed.  When I sleep on a mattress that has supportive coils I sleep well and no back pain.  Takes two nights max to be pain free.
I live in central CA and there is a bed maker fairly close by who makes his beds like you mentioned.  There is one in the showroom that has a Bonnell unit and a zippered cover so you can pick out/adjust your foam. This guy knows the ins and outs of mattress making.  He's built several for us over the years, and really stands behind his stuff.  I went through the buy-return-giveaway-mattress thing after the Tallalay latex mattress I bought from him(he still chides me about it, would have fixed it/taken it back in return even a few years after I bought it...where else can you find that?!)failed my back.  I just had to shop around to realize what I had right here.
My last purchase went to him in the first week (Stress-O-Pedic) as it was overly soft and not supportive.  His bed maker removed the original foam and beefed  up the coils, remade it very nice and comfortable.  But I still had some low back pain when I woke up in the morning so there was something still amiss.  After several adjustments, finally culminating with me opening up and performing my own surgery, I have realized that my issue is the Marshall unit(individually wrapped coil) not supporting me enough. 
Rather than messing around with this anymore, I am going to have him make me the mattress exactly as you described.  He does carry a nice PU foam that has been working well in this bed for a year now.  I'd like to see how some Dunlop(sp?) latex feels too, but not sure he carries it.

Kait