Help with brakes needed pls

[Dave48]

When I did last brake overhaul on my FZS 600 I bought seal kits from a firm called Powerhouse-  Phone 0114-235-1010 (Sheffield).
Might be worth giving them a call? Their reference for complete kit for FZS 600 (both front calipers) is150984884244
Alternatively remove one caliper ,dismantle & measure.-obviously not an option if you are using the bike daily. Hope this help or maybe some other "foccer" will know seal thickness. Dave