According to what a sales associate at Home Depot told me, they bought Ryobi and that will be their "house brand" henceforth. That is heresay, I have no other info. But, if true, parts should be readily available. Plus, alot of Sears models are nothing more than Ryobi's with a house label, or at least used to be.
As for drill bits, Joss, I take a different tack than may others. I have an expensive drill-bit sharpener, and it puts a marvelous edge on bits. However, i found long ago that the small bits are a PITA to index properly to get a good grind on. I tried cobalt, nitrided bits, etc, when I worked with alot of stainless. They all crapped out quickly for my tastes. Thus, I turned to the cheap HSS short-length bits from MSC, use em for several knives until I don't like how they cut, then I toss em. Works for me....