Tennessee Hickory Products
http://www.tennesseehickoryproducts.com/index.shtml
This page fills the customer in on the details. They use a 4 digit numbering system for ordering.
http://www.tennesseehickoryproducts.com/orders.shtml
Link to the specific numbers for handle styles and lengths:
http://www.tennesseehickoryproducts.com/images/eye_handle_guide.pdf
So for instance, if you want a 32 straight single bit you order the 1232
1 Axe handle
2 Straight
32 length
1232-X would be octagonal.
If you want a 30 sledge hammer handle you order the 2130
2- Hammer
1 Sledge
30 - length
House Handle is easier with the drop down menus for sure. Make a shopping list, check it twice, and send an email to their contact list.
Looks like blanks can be had from Charles O Cox Corporation. For those it looks like you have to contact the sales at Tennessee Hickory Products as they dont have site and everything points back to the Tennessee Hickory Products home page as a contact.
I have only happened upon their handles here locally and not ordered online but I am thinking of doing so. I have most of that guide memorized and a list already made.
So, I can't comment on shipping, customer service, speed of delivery, or return policy.
I can say the ones I have found have been all sapwood and pretty straight - it's wood after all.
*They also state that they do not sort by heartwood or sapwood so dont expect them to be all of one or a mix.
Also - place an order and tell them you have been disappointed with their competitor and you will share what you get.