Diamond Plated Core Drill Bits
 

I just received the 2 drill bits I ordered, a 2" and a 2.5" from this company in the US. http://www.technologylk.com/products.aspx?category_ID=3

I purchased a 1.5 " earlier and was pleased with their service. I am still using the 1.5" and I have drilled 20 + holes. For cost break down here it is.

I requested USPS

94.90 for the bits
19.95 shipping
5.00 USPS brokerage charge
6.00 GST

No hidden charges(whew)
Kevin