If you want to build your own, wood (as above).. If you want to buy parts - Home Depot has these "mini pallet rack" type jobbies... Something like this, but there's a cheaper one somewhere, $500+ is nuts... But, 1800 lbs is also overkill...
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Here they are, found them.. $34/upright... 72"H x 24"W...48" cross member is $10, 96" is $20... I think you'd have to go longer because you'd have to lift them in sideways, versus the "front" attack method...