I looked at end-mills but couldn't find a cheap one with a suitable shank size of 1/2".
I went physically to:
1. Northern Tools
2. Harbour Freight
3. Home Depot
and not one of them had a 13/16 drill-bit, or a 13/16 Forstner bit, or anything else.
I ended up buying about the same thing T-slots Inc had but for half the price (and twice the shipping). MSC Industrial Supply doesn't tell you how much shipping is till they ship it. But, by that time they already have your credit card number and the order is processed. I assume shipping is a fortune. What kind of company does that? I won't do business with them again because of that. It's just insane.
I really spent too much anyway, but it looks like a nice tool - $28.81 + probably $20 shipping (
http://www.mscdirect.com/IWCatProduc...roduct_Id=5566 )
I also bought a regular 13/16 drill-bit off of Ebay. It was $11 with shipping (Paid more for shipping and handling then the bit sold for).
So much for "Cheap"...In for a penny, in for a pound!