Just about any narrow type buckets. You'll have to build and weld mounts and brackets anyway. But a model A is fairly narrow compared to todays car so measure across and check the width. Then look at some buckets that have enough clearance. Try a wrecking yard first because you can probably get all the mounting hard ware with them. Do your modifications and then get them re-upholstered and you're set to go. Good Luck.