If price/availability is an issue... Cabbage Patch makes a "boy baby" doll. I never thought I'd get a Cabbage Patch doll for my children (though I remember desperately wanting one myself ages ago LOL) but my son is obsessed with belly buttons and the Cabbage Patch doll was a boy AND it has a belly button. The head is plastic, but the body is soft and DS loves to cuddle it. He picked it out at Target and I think it was about 15 dollars.
Â
We also have a waldorf style boy doll made by a local crafter, but it doesn't attract the same amount of love/attention and in retrospect I think that dollis more for "me" and what I want my kiddos to like and less about what my DS actually wants in a doll. Ah well, it's a wonderful doll and I'm sure some day it'll get the love it deserves! If you do look into getting this sort of doll, maybe see if this little guy enjoys that style of doll? My girls never warmed up to the waldorf dolls I made for them and again... I don't regret the experience of making the dolls, but in retrospect those dolls aren't a good match for dd1 or dd2. Anyway, there is a nice natural toy store here where they let the kiddos play with many of the items that are also for sale. Perhaps there is something similar near you/your nephew just so you don't spend a huge chunk of change on a toy that the adults love more than he does?
Â
Oh, the Groovy Girl dolls (Manhattan Toy Company) have several boys though these are more tween/teen style dolls... they do have clothing and accessories, and the dolls are not buttonholed (their clothing isn't as gendered as with some dolls, their skin color/eye color/hair color varies a lot, the accessories reflect activities like camping and skating more than fashion/beauty), but they require a fair amount of manual dexterity to dress. They do wash up nicely in the laundry though (I throw them in a pillow case) if you don't mind having to do the long hair styles over again. The plain old boy dolls are around 15-20 dollars, the fancier knight/prince dolls are more like 20-30 I think.