I know I'm starting to sound like an advertisement, but I'd reach out to Valextra's main Milan boutique. I was simply floored by the level of customer service, plus it was great having access to styles not available in the States (where only Barney's sells Valextra).
To look at styles, I'd try both the Italian and Japanese sites, since there is little overlap between them and the Japanese site is much more extensive. Feel free to PM me and I can give you the name/email of the person I dealt with.
Barney's has this:
Though I'm not wild about gusseted pockets unless you can actually fill them
Now consider these (none available on Barney's website):
I recently bought this in a black pebble grain leather and it's beautiful:
I used to carry this in navy, before deciding to go with a fold-over case:
This is similar to the first one, but the exterior dimensions are different and, in my opinion, not ideal for front pocket use:
This is a wallet, not a card case, but has the same external dimensions as the one above and also shows you one of the darker greens (called Valextra Green, I think) available:
I know I've seen that flat card case in Valextra Green but not sure about the folding ones. I know that the first one I showed you, the simple four-pocket fold-over in sea green, isn't available in Valextra Green since I asked. However they'll take special orders and I think it takes a month or two. Like I said, PM me for details.