Bobobie and resinsoul are definitely the cheaper you can get. And a little more expensive one (and also with a big difference - resinsoul and bobobie are super slim, and aod are not) but still affordable, Angel of Dream. Luts also have beautiful bodies in ns and ws but the price of just the body = a full resinsou doll.
Doll Leaves also has very inexpensive bodies, although right now I can't remember how much, and I'm not sure how they compare in price to a bobobie.
I only have an SD-sized AOD, but they are really good quality for the price. I also agree with everyone saying Bobobie/ResinSoul dolls. They are very cute and a decent price. I just sold a tiny BBB just because I couldn't get attached to the size, but she was adorable.
Fantasy doll - www.fdoll.com mini bodies are $108 though resinsoul are still cheaper. Doll leaves are $128, there is also 5stardoll at $130. Angel of Dream are $120. edit: I've found Lost Angel (Miro doll shop) which sells bodies for $88 though I haven't really heard of them but I've found them in this thread: http://www.denofangels.com/forums/s...r-300-(as-of-June-2006)&p=3873501#post3873501
Only-doll is another pretty affordable company. As for the Dollstown head...I have no idea, sorry xD Perhaps you can look/ask in the picture request forum?
I am not sure that any of those bodies will work with the Dollstown & year old head. Quite apart from skin tone, that head needs a neck circumference of 7.9cm, while, for example, Fantasydoll 1/4 necks are 6.5 cm, Resinsoul is 6cm and Mirodoll is a teensy 5.5cm! The 7 year old body is pretty unique, it might be hard to fit a cheaper body to the head, but I don't think any of these options would fit.
Agreed, DT heads are chunky, there's no way you're going to get away with putting it on one of the slimmer mini's, you'd be better going for something with a bit of meat to it, like the DoD kids or possibly even a volks, but neither of those are cheap and I can tell you from owning a DT head, that basically nothing matches that resin properly, so you'd need to blush it to match anyway.
I think 5StarDolls are really beautiful and good quality for their price (around 200 dollars, less for just the body). Go check 'em out!