SDS/SDS+ Shank Ship Auger Bit?

[NotSoSimple]

I am needing to drill some 1/2" holes in timbers to drive 1/2" rebar into. I cannot seem to find a good selection of ship auger bits with an SDS or SDS+ shank. Unfortunately the only corded drill I have up to the task is an older Milwaukee Hawk. Anyone know of a source for once of these? I would need the bit to be 10" or longer as well.

 

[sam.coll]

Not even sure if they make them? maybe a sds+ adaptor with 1/2" chuck would be a better option?

 

[NotSoSimple]

There are a few, but none that fit my needs. Would an SDS+ to 1/2" chuck be advisable?

 

[sam.coll]

Y would it not be advisable?