Hey! How can I have a Dollars identity card?

I'm quite sure those don't exist.
For one, the dollars are an anonymous group, and secondly, they are in no way as significant irl as in they are in the source material. It's pretty much just a BBS website, not really much of an orginisation to have identity cards. If you would want one, you could create a design in photoshop or a similar program, and have it be printed on a card by a professional.