Amazon.com : iShoot Tripod Head Clamp Adapter Converter Compatible with & for ARCA-Swiss Fit Clamp Use to Tripod Ball Head of Gitzo 82TQD 82QD, Manfrotto MH490 492 494 496 498, MH054 055
Midi Ball Head - 498 | Manfrotto Global
Used Manfrotto 498RC2 Midi Ball Head 498 with RC2 Rapid Connect Plate- SKU#1607825 498RC2
Clamp for Manfrotto 490 494 496 498 Ball Head 200PL 410PL Quick Release Plate | eBay
Manfrotto launches XPRO Ball Head: Digital Photography Review