in a design or with a design
 

Suppose that you are shopping in a store which sells custom-made wallets and keychains. A sales clerk is showing you different designs for wallets and keychains. This is what you say to him or her.

(1) I would like a wallet in this design and a keychain in that design.

My next example is not related to the first one.

(2a) These birthday cards have five different types of artwork to choose from.

(2b) These birthday cards have five different artworks to choose from.

In (1), is "in" the correct preposition?

In (2), the noun, artwork, can be both countable and uncountable? I am not sure which one is grammatically correct, (a) or (b)?
Please help me. Thank you very much.

Re: in a design or with a design
 

1. Sounds fine. Thouh "with" is also possible

2. Definitely "different types of". "work", in this sense, is uncountable - and therefore can't be pluralised. You'd only use it countably if talking about eg roadworks - something where some sort of construction work is underway.