Here's a review of three e-liquids from Black Cloud Vapor. The prices are relatively low at $10.99 for a 30ml bottle. The full text review with steeping notes is here. The Cliffs Note version is below.
RY4: An atypical RY4 that uses tobacco, caramel and, cocoa instead of thee traditional blend of tobacco, caramel, and vanilla. It's bittersweet and nutty, and tastes nothing like a typical RY4.
Cell Block 6: Described as "RY4 to the next level," this juice has stronger flavors. The increased sweetness helps drown out the bitter tones, but it still doesn't taste like an RY4.
Gluttony: Vanilla, coconut, peach, and pineapple are used in an interesting mix that's sweet, creamy, and tart.