4 or smaller digit ASNs

Hello NANOG... I have a client interested in picking up a new AS number but they really want it to be 3 or 4 digits in length. Is there a process to request this from ARIN, or doss anyone know of unused ASns fitting this that anyone is looking to sell for some quick cash? Thanks! James Sent via the Samsung Galaxy S7 active, an AT&T 4G LTE smartphone