In addition to JoeLorigo's suggested Astra (for 1590N1), Aion also offers an Astra "legacy" PCB — legacy-PCBs are great because you don't have to deal with the proprietary Aion N1-daughterboards for the footswitch, yet still build it in an N1 with top-jacks.
More Sam Ash...
Also a PCB available from GuitarPCB.
If you go with the GPCB, pick up some of the utility PCBs there such as the 2knob-job and GBOF, they're extremely useful for mods.