What do you mean by "newer"? IMO, your best bet for newer currency is a bank. They have it at face value.
Raw=bank for real current series. Coin shops can have stock from 1928-60's maybe 70's if they deal with currency. Ulimitedcurrency.com is a site but the "newest" currency they have is like early to mid 80's and 90's. All their stuff is also PMG, PCGS graded no raw. Skylinecoins.com has old and new currency raw but buyer beware many even here on CT have complained about skyline's quality and customer service mostly on coins being cleaned or overgraded. CCcoinandcurrency.com out of corpus cristi is another place I have bought from years ago so quality may or may not be up to par but unless you are looking for newer currency from the 50-90's why would you pay their premium for a 2003 issue when your bank may as others suggested have them for face value. Currency dealers will also advertise in coin mags and even in the coin dealer newsletter (CDN) especially in the green sheet for currency so a trip to the local book store that sells magazines or purchasing a green sheet may be a solution for you to expand your buying network.
Finding newer currency is sometimes not all that easy. I've been looking for about 10 notes from 2001 to 2009 and cant seem to find them, and I have looked and looked. I'm not looking for any kind of special numbers, errors, etc. just nice standard notes, like a 2001-FW $ 1.00, or a 2001-DC $ 20.00 etc. I know these notes don't have much value other than face but I cant seem to find those and a lot of other newer notes. I only want them to fill in the holes in my collection. It seems easer to find notes from the 1930's to the 80's than the newer ones. So if you find anyone dealing in newer notes in all denominations from $1.00 to $ 100.00 ( been looking for a 2006-FW $ 100.00 for a long time now ) please let me know, I'm a buyer. Bill Collector
