You can buy the gun, foot valve, and pickup tube from here:
https://www.redlinestands.com/catalog/shop-equipment-c-327/sand-blast-equipment-c-327_501/sand-blast-replacement-parts-c-327_501_507/re4870-48cs270-sand-blast-cabinet-replacement-gun-p-1676
https://www.redlinestands.com/catalog/shop-equipment-c-327/sand-blast-equipment-c-327_501/sand-blast-replacement-parts-c-327_501_507/redline-sand-blast-cabinet-metal-pickup-tube-p-2696
https://www.redlinestands.com/catalog/lifts-c-290/parts-accessories-c-290_304/air-motorcycle-lift-parts-c-290_304_306/redline-replacement-motorcycle-lift-table-foot-pedal-p-1435