I know you said 550, but here's a 595 kit for sale currently:
https://www.m3post.com/forums/showthread.php?t=1847046
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New: '11.5 e90 M3 | DCT | Space Gray/Novillo | ZCV | ZCW | ZP2 | ESS 625+ | BPM | M Performance | iPE | BC Racing | BPM | iND | LUX | Dinan | Volk | Coby | Recaro | NRW | Slon
Sold: '11.5 e92 M3 | DCT | Mineral White/Novillo | ZCP | ZCV | ZCW | ZP2 | M Performance | ACM | BPM | iND | Thule | LUX | Macht Schnell | Broadway Static | Rogue Engineering | BBS | Challenge | Metak