1) Wallet: $1,125 USD (that includes either caviar or lambskin); 8 cc slots, 2 bill slots, a center zipped compartment that some might consider keeping coins in; I do not because I think that soils the beautiful burgundy textile as well as adding additional weight to the wallet itself and, in turn, your handbag; plus ample space on both sides of the zip compartment; this is where I keep my driver's license and health insurance cards.
2) Cosmetic Case: $600 USD (a few have been recently posted to the Shopping Forum under Boutique/Dept store finds; I believe it may also come in caviar)
I must admit, I do agree with "coxswain1" that the zip-around part can become somewhat annoying. Perhaps it takes time getting use to? However, I definitely love a gusseted wallet. I think "Jc.chen58" might have it right with a flap gusseted wallet. Yet my only pause is that it might take-up a bit more space in my jumbo classic flaps than a straight zip-around wallet since the flap protrudes a bit further out?
Ultimately my SLG strategy was "how to pack everything I needed into a jumbo classic double flap handbag". The zip-around wallet + the 2 cosmetic cases (I have a number of medical conditions that require I always carry certain medications, etc., plus a TON of other stuff one might be surprised
) + a hankerchef + 2 pairs of Chanel eyeglasses (sunnies and reading) in soft cases, ALL fit like a perfect puzzle into my jumbo CFs leaving nothing loose to scratch the leather interior of my handbag, nor is my CF stuffed "like a turkey".