I have been purchasing my past micro bits from DnD (https://www.dndsawbladesonline.com/page/448829586 ) and they have been the best yet.... Don't buy cheapies and don't buy one of each size... Micro bits break,,, you will want to buy like a dozen of each size you want. I think Denny, member here ( https://www.artcraftersonline.com ) sells the same brand.... they are both great places to do business with. My drill press chuck closes all the way down so I do not need a chuck adapter... I had one on the last drill press I had and it wobbles so bad it was unusable... so I can't give you a recommendation on that.
P.S. Just saw this posted.... (Artcrafters)